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Finding the Fourth Proportional to 991,951, 1,368,902.10 and 539,251.72

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Solution

The fourth proportional to 991,951, 1,368,902.10 and 539,251.72 is: 744,172.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,951 : 1,368,902.10 = 539,251.72 : x
  2. Step 2: Convert to fraction form
    991,951/1,368,902.10 = 539,251.72/x
  3. Step 3: Cross multiply
    991,951x = 1,368,902.10 × 539,251.72
  4. Step 4: Simplify right side
    991,951x = 738,182,811,936.61
  5. Step 5: Solve for x
    x = 738,182,811,936.61/991,951
  6. Step 6: Final answer
    x = 744,172.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.