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Finding the Fourth Proportional to 624,138.30, 936,207.45 and 309,210.30

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Solution

The fourth proportional to 624,138.30, 936,207.45 and 309,210.30 is: 463,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,138.30 : 936,207.45 = 309,210.30 : x
  2. Step 2: Convert to fraction form
    624,138.30/936,207.45 = 309,210.30/x
  3. Step 3: Cross multiply
    624,138.30x = 936,207.45 × 309,210.30
  4. Step 4: Simplify right side
    624,138.30x = 289,484,986,476.74
  5. Step 5: Solve for x
    x = 289,484,986,476.74/624,138.30
  6. Step 6: Final answer
    x = 463,815.45

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Half scale
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Double scale
Find fourth proportional to 624,139.30, 936,208.95 and 309,211.30
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.