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Finding the Fourth Proportional to 389,648.60, 584,478.66 and 109,148.12

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Solution

The fourth proportional to 389,648.60, 584,478.66 and 109,148.12 is: 163,723.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,648.60 : 584,478.66 = 109,148.12 : x
  2. Step 2: Convert to fraction form
    389,648.60/584,478.66 = 109,148.12/x
  3. Step 3: Cross multiply
    389,648.60x = 584,478.66 × 109,148.12
  4. Step 4: Simplify right side
    389,648.60x = 63,794,746,919.12
  5. Step 5: Solve for x
    x = 63,794,746,919.12/389,648.60
  6. Step 6: Final answer
    x = 163,723.79

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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.