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Finding the Fourth Proportional to 621,817.70, 932,726.55 and 486,515.30

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Solution

The fourth proportional to 621,817.70, 932,726.55 and 486,515.30 is: 729,772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,817.70 : 932,726.55 = 486,515.30 : x
  2. Step 2: Convert to fraction form
    621,817.70/932,726.55 = 486,515.30/x
  3. Step 3: Cross multiply
    621,817.70x = 932,726.55 × 486,515.30
  4. Step 4: Simplify right side
    621,817.70x = 453,785,737,291.22
  5. Step 5: Solve for x
    x = 453,785,737,291.22/621,817.70
  6. Step 6: Final answer
    x = 729,772.95

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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.