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Finding the Fourth Proportional to 645,945.70, 968,918.55 and 616,915.30

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Solution

The fourth proportional to 645,945.70, 968,918.55 and 616,915.30 is: 925,372.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,945.70 : 968,918.55 = 616,915.30 : x
  2. Step 2: Convert to fraction form
    645,945.70/968,918.55 = 616,915.30/x
  3. Step 3: Cross multiply
    645,945.70x = 968,918.55 × 616,915.30
  4. Step 4: Simplify right side
    645,945.70x = 597,740,677,948.82
  5. Step 5: Solve for x
    x = 597,740,677,948.82/645,945.70
  6. Step 6: Final answer
    x = 925,372.95

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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.