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Finding the Fourth Proportional to 287,959.80, 432,134.10 and 187,876.20

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Solution

The fourth proportional to 287,959.80, 432,134.10 and 187,876.20 is: 281,941.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,959.80 : 432,134.10 = 187,876.20 : x
  2. Step 2: Convert to fraction form
    287,959.80/432,134.10 = 187,876.20/x
  3. Step 3: Cross multiply
    287,959.80x = 432,134.10 × 187,876.20
  4. Step 4: Simplify right side
    287,959.80x = 81,187,712,598.42
  5. Step 5: Solve for x
    x = 81,187,712,598.42/287,959.80
  6. Step 6: Final answer
    x = 281,941.13

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1.5x scale

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.