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Finding the Fourth Proportional to 646,951.20, 970,426.80 and 617,920.80

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Solution

The fourth proportional to 646,951.20, 970,426.80 and 617,920.80 is: 926,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,951.20 : 970,426.80 = 617,920.80 : x
  2. Step 2: Convert to fraction form
    646,951.20/970,426.80 = 617,920.80/x
  3. Step 3: Cross multiply
    646,951.20x = 970,426.80 × 617,920.80
  4. Step 4: Simplify right side
    646,951.20x = 599,646,904,597.44
  5. Step 5: Solve for x
    x = 599,646,904,597.44/646,951.20
  6. Step 6: Final answer
    x = 926,881.20

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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.