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Finding the Fourth Proportional to 389,565.96, 584,275.12 and 136,787.03

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Solution

The fourth proportional to 389,565.96, 584,275.12 and 136,787.03 is: 205,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,565.96 : 584,275.12 = 136,787.03 : x
  2. Step 2: Convert to fraction form
    389,565.96/584,275.12 = 136,787.03/x
  3. Step 3: Cross multiply
    389,565.96x = 584,275.12 × 136,787.03
  4. Step 4: Simplify right side
    389,565.96x = 79,921,258,064.81
  5. Step 5: Solve for x
    x = 79,921,258,064.81/389,565.96
  6. Step 6: Final answer
    x = 205,154.63

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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.