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Finding the Fourth Proportional to 645,751.20, 968,626.80 and 616,720.80

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Solution

The fourth proportional to 645,751.20, 968,626.80 and 616,720.80 is: 925,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,751.20 : 968,626.80 = 616,720.80 : x
  2. Step 2: Convert to fraction form
    645,751.20/968,626.80 = 616,720.80/x
  3. Step 3: Cross multiply
    645,751.20x = 968,626.80 × 616,720.80
  4. Step 4: Simplify right side
    645,751.20x = 597,372,294,997.44
  5. Step 5: Solve for x
    x = 597,372,294,997.44/645,751.20
  6. Step 6: Final answer
    x = 925,081.20

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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.