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Finding the Fourth Proportional to 555,156, 766,115.28 and 316,692

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Solution

The fourth proportional to 555,156, 766,115.28 and 316,692 is: 437,034.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,156 : 766,115.28 = 316,692 : x
  2. Step 2: Convert to fraction form
    555,156/766,115.28 = 316,692/x
  3. Step 3: Cross multiply
    555,156x = 766,115.28 × 316,692
  4. Step 4: Simplify right side
    555,156x = 242,622,580,253.76
  5. Step 5: Solve for x
    x = 242,622,580,253.76/555,156
  6. Step 6: Final answer
    x = 437,034.96

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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.