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Finding the Fourth Proportional to 645,752.20, 968,628.30 and 616,721.80

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Solution

The fourth proportional to 645,752.20, 968,628.30 and 616,721.80 is: 925,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,752.20 : 968,628.30 = 616,721.80 : x
  2. Step 2: Convert to fraction form
    645,752.20/968,628.30 = 616,721.80/x
  3. Step 3: Cross multiply
    645,752.20x = 968,628.30 × 616,721.80
  4. Step 4: Simplify right side
    645,752.20x = 597,374,188,706.94
  5. Step 5: Solve for x
    x = 597,374,188,706.94/645,752.20
  6. Step 6: Final answer
    x = 925,082.70

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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.