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Finding the Fourth Proportional to 642,600.90, 963,901.35 and 493,301.70

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Solution

The fourth proportional to 642,600.90, 963,901.35 and 493,301.70 is: 739,952.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,600.90 : 963,901.35 = 493,301.70 : x
  2. Step 2: Convert to fraction form
    642,600.90/963,901.35 = 493,301.70/x
  3. Step 3: Cross multiply
    642,600.90x = 963,901.35 × 493,301.70
  4. Step 4: Simplify right side
    642,600.90x = 475,494,174,587.30
  5. Step 5: Solve for x
    x = 475,494,174,587.30/642,600.90
  6. Step 6: Final answer
    x = 739,952.55

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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.