Home / 1,389,381.87-2,083,781.20-391,876.59

Finding the Fourth Proportional to 1,389,381.87, 2,083,781.20 and 391,876.59

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Solution

The fourth proportional to 1,389,381.87, 2,083,781.20 and 391,876.59 is: 587,732.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389,381.87 : 2,083,781.20 = 391,876.59 : x
  2. Step 2: Convert to fraction form
    1,389,381.87/2,083,781.20 = 391,876.59/x
  3. Step 3: Cross multiply
    1,389,381.87x = 2,083,781.20 × 391,876.59
  4. Step 4: Simplify right side
    1,389,381.87x = 816,585,070,962.11
  5. Step 5: Solve for x
    x = 816,585,070,962.11/1,389,381.87
  6. Step 6: Final answer
    x = 587,732.64

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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.