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Finding the Fourth Proportional to 922,574.72, 1,383,960.54 and 390,149.57

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Solution

The fourth proportional to 922,574.72, 1,383,960.54 and 390,149.57 is: 585,265.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,574.72 : 1,383,960.54 = 390,149.57 : x
  2. Step 2: Convert to fraction form
    922,574.72/1,383,960.54 = 390,149.57/x
  3. Step 3: Cross multiply
    922,574.72x = 1,383,960.54 × 390,149.57
  4. Step 4: Simplify right side
    922,574.72x = 539,951,609,577.97
  5. Step 5: Solve for x
    x = 539,951,609,577.97/922,574.72
  6. Step 6: Final answer
    x = 585,265.99

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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.