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Finding the Fourth Proportional to 499,134.72, 688,806.40 and 272,780.32

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Solution

The fourth proportional to 499,134.72, 688,806.40 and 272,780.32 is: 376,437.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,134.72 : 688,806.40 = 272,780.32 : x
  2. Step 2: Convert to fraction form
    499,134.72/688,806.40 = 272,780.32/x
  3. Step 3: Cross multiply
    499,134.72x = 688,806.40 × 272,780.32
  4. Step 4: Simplify right side
    499,134.72x = 187,892,830,210.05
  5. Step 5: Solve for x
    x = 187,892,830,210.05/499,134.72
  6. Step 6: Final answer
    x = 376,437.11

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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.