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Finding the Fourth Proportional to 282,337.10, 389,625.86 and 155,020.90

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Solution

The fourth proportional to 282,337.10, 389,625.86 and 155,020.90 is: 213,929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,337.10 : 389,625.86 = 155,020.90 : x
  2. Step 2: Convert to fraction form
    282,337.10/389,625.86 = 155,020.90/x
  3. Step 3: Cross multiply
    282,337.10x = 389,625.86 × 155,020.90
  4. Step 4: Simplify right side
    282,337.10x = 60,400,151,480.47
  5. Step 5: Solve for x
    x = 60,400,151,480.47/282,337.10
  6. Step 6: Final answer
    x = 213,929.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.