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Finding the Fourth Proportional to 641,995.20, 962,071.20 and 472,190.40

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Solution

The fourth proportional to 641,995.20, 962,071.20 and 472,190.40 is: 707,607.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,995.20 : 962,071.20 = 472,190.40 : x
  2. Step 2: Convert to fraction form
    641,995.20/962,071.20 = 472,190.40/x
  3. Step 3: Cross multiply
    641,995.20x = 962,071.20 × 472,190.40
  4. Step 4: Simplify right side
    641,995.20x = 454,280,784,756.48
  5. Step 5: Solve for x
    x = 454,280,784,756.48/641,995.20
  6. Step 6: Final answer
    x = 707,607.76

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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.