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Finding the Fourth Proportional to 389,613.39, 584,478.51 and 136,849.32

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Solution

The fourth proportional to 389,613.39, 584,478.51 and 136,849.32 is: 205,294.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,613.39 : 584,478.51 = 136,849.32 : x
  2. Step 2: Convert to fraction form
    389,613.39/584,478.51 = 136,849.32/x
  3. Step 3: Cross multiply
    389,613.39x = 584,478.51 × 136,849.32
  4. Step 4: Simplify right side
    389,613.39x = 79,985,486,648.11
  5. Step 5: Solve for x
    x = 79,985,486,648.11/389,613.39
  6. Step 6: Final answer
    x = 205,294.50

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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.