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Finding the Fourth Proportional to 317,628.31, 476,428.80 and 80,963.93

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Solution

The fourth proportional to 317,628.31, 476,428.80 and 80,963.93 is: 121,442.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,628.31 : 476,428.80 = 80,963.93 : x
  2. Step 2: Convert to fraction form
    317,628.31/476,428.80 = 80,963.93/x
  3. Step 3: Cross multiply
    317,628.31x = 476,428.80 × 80,963.93
  4. Step 4: Simplify right side
    317,628.31x = 38,573,548,013.18
  5. Step 5: Solve for x
    x = 38,573,548,013.18/317,628.31
  6. Step 6: Final answer
    x = 121,442.41

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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.