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Finding the Fourth Proportional to 630,440.70, 945,661.05 and 314,946.30

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Solution

The fourth proportional to 630,440.70, 945,661.05 and 314,946.30 is: 472,419.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,440.70 : 945,661.05 = 314,946.30 : x
  2. Step 2: Convert to fraction form
    630,440.70/945,661.05 = 314,946.30/x
  3. Step 3: Cross multiply
    630,440.70x = 945,661.05 × 314,946.30
  4. Step 4: Simplify right side
    630,440.70x = 297,832,448,751.62
  5. Step 5: Solve for x
    x = 297,832,448,751.62/630,440.70
  6. Step 6: Final answer
    x = 472,419.45

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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.