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Finding the Fourth Proportional to 646,747.80, 970,121.70 and 610,006.20

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Solution

The fourth proportional to 646,747.80, 970,121.70 and 610,006.20 is: 915,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,747.80 : 970,121.70 = 610,006.20 : x
  2. Step 2: Convert to fraction form
    646,747.80/970,121.70 = 610,006.20/x
  3. Step 3: Cross multiply
    646,747.80x = 970,121.70 × 610,006.20
  4. Step 4: Simplify right side
    646,747.80x = 591,780,251,754.54
  5. Step 5: Solve for x
    x = 591,780,251,754.54/646,747.80
  6. Step 6: Final answer
    x = 915,009.30

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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.