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Finding the Fourth Proportional to 642,604.20, 963,614.70 and 243,112.20

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Solution

The fourth proportional to 642,604.20, 963,614.70 and 243,112.20 is: 364,557.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,604.20 : 963,614.70 = 243,112.20 : x
  2. Step 2: Convert to fraction form
    642,604.20/963,614.70 = 243,112.20/x
  3. Step 3: Cross multiply
    642,604.20x = 963,614.70 × 243,112.20
  4. Step 4: Simplify right side
    642,604.20x = 234,266,489,669.34
  5. Step 5: Solve for x
    x = 234,266,489,669.34/642,604.20
  6. Step 6: Final answer
    x = 364,557.98

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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.