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Finding the Fourth Proportional to 287,451.80, 431,177.70 and 282,786.20

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Solution

The fourth proportional to 287,451.80, 431,177.70 and 282,786.20 is: 424,179.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,451.80 : 431,177.70 = 282,786.20 : x
  2. Step 2: Convert to fraction form
    287,451.80/431,177.70 = 282,786.20/x
  3. Step 3: Cross multiply
    287,451.80x = 431,177.70 × 282,786.20
  4. Step 4: Simplify right side
    287,451.80x = 121,931,103,307.74
  5. Step 5: Solve for x
    x = 121,931,103,307.74/287,451.80
  6. Step 6: Final answer
    x = 424,179.30

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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.