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Finding the Fourth Proportional to 890,327.28, 1,228,639 and 482,419.58

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Solution

The fourth proportional to 890,327.28, 1,228,639 and 482,419.58 is: 665,732.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,327.28 : 1,228,639 = 482,419.58 : x
  2. Step 2: Convert to fraction form
    890,327.28/1,228,639 = 482,419.58/x
  3. Step 3: Cross multiply
    890,327.28x = 1,228,639 × 482,419.58
  4. Step 4: Simplify right side
    890,327.28x = 592,719,510,351.62
  5. Step 5: Solve for x
    x = 592,719,510,351.62/890,327.28
  6. Step 6: Final answer
    x = 665,732.17

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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.