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Finding the Fourth Proportional to 498,998.28, 688,866.30 and 308,116.92

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Solution

The fourth proportional to 498,998.28, 688,866.30 and 308,116.92 is: 425,354.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,998.28 : 688,866.30 = 308,116.92 : x
  2. Step 2: Convert to fraction form
    498,998.28/688,866.30 = 308,116.92/x
  3. Step 3: Cross multiply
    498,998.28x = 688,866.30 × 308,116.92
  4. Step 4: Simplify right side
    498,998.28x = 212,251,362,647.80
  5. Step 5: Solve for x
    x = 212,251,362,647.80/498,998.28
  6. Step 6: Final answer
    x = 425,354.90

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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.