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Finding the Fourth Proportional to 648,009.80, 972,014.70 and 624,390.20

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Solution

The fourth proportional to 648,009.80, 972,014.70 and 624,390.20 is: 936,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,009.80 : 972,014.70 = 624,390.20 : x
  2. Step 2: Convert to fraction form
    648,009.80/972,014.70 = 624,390.20/x
  3. Step 3: Cross multiply
    648,009.80x = 972,014.70 × 624,390.20
  4. Step 4: Simplify right side
    648,009.80x = 606,916,452,935.94
  5. Step 5: Solve for x
    x = 606,916,452,935.94/648,009.80
  6. Step 6: Final answer
    x = 936,585.30

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Half scale
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Double scale
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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.