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Finding the Fourth Proportional to 499,137.12, 688,807.56 and 272,782.56

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Solution

The fourth proportional to 499,137.12, 688,807.56 and 272,782.56 is: 376,439.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,137.12 : 688,807.56 = 272,782.56 : x
  2. Step 2: Convert to fraction form
    499,137.12/688,807.56 = 272,782.56/x
  3. Step 3: Cross multiply
    499,137.12x = 688,807.56 × 272,782.56
  4. Step 4: Simplify right side
    499,137.12x = 187,894,689,564.15
  5. Step 5: Solve for x
    x = 187,894,689,564.15/499,137.12
  6. Step 6: Final answer
    x = 376,439.02

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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.