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Finding the Fourth Proportional to 316,978.16, 437,427.26 and 173,737.88

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Solution

The fourth proportional to 316,978.16, 437,427.26 and 173,737.88 is: 239,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,978.16 : 437,427.26 = 173,737.88 : x
  2. Step 2: Convert to fraction form
    316,978.16/437,427.26 = 173,737.88/x
  3. Step 3: Cross multiply
    316,978.16x = 437,427.26 × 173,737.88
  4. Step 4: Simplify right side
    316,978.16x = 75,997,684,806.61
  5. Step 5: Solve for x
    x = 75,997,684,806.61/316,978.16
  6. Step 6: Final answer
    x = 239,756.85

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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.