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Finding the Fourth Proportional to 356,312.88, 534,621.60 and 156,780.72

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Solution

The fourth proportional to 356,312.88, 534,621.60 and 156,780.72 is: 235,238.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,312.88 : 534,621.60 = 156,780.72 : x
  2. Step 2: Convert to fraction form
    356,312.88/534,621.60 = 156,780.72/x
  3. Step 3: Cross multiply
    356,312.88x = 534,621.60 × 156,780.72
  4. Step 4: Simplify right side
    356,312.88x = 83,818,359,375.55
  5. Step 5: Solve for x
    x = 83,818,359,375.55/356,312.88
  6. Step 6: Final answer
    x = 235,238.08

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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.