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Finding the Fourth Proportional to 438,343.40, 657,515.10 and 349,769.90

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Solution

The fourth proportional to 438,343.40, 657,515.10 and 349,769.90 is: 524,654.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,343.40 : 657,515.10 = 349,769.90 : x
  2. Step 2: Convert to fraction form
    438,343.40/657,515.10 = 349,769.90/x
  3. Step 3: Cross multiply
    438,343.40x = 657,515.10 × 349,769.90
  4. Step 4: Simplify right side
    438,343.40x = 229,978,990,775.49
  5. Step 5: Solve for x
    x = 229,978,990,775.49/438,343.40
  6. Step 6: Final answer
    x = 524,654.85

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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.