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Finding the Fourth Proportional to 287,304.20, 431,030.40 and 137,659.96

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Solution

The fourth proportional to 287,304.20, 431,030.40 and 137,659.96 is: 206,525.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,304.20 : 431,030.40 = 137,659.96 : x
  2. Step 2: Convert to fraction form
    287,304.20/431,030.40 = 137,659.96/x
  3. Step 3: Cross multiply
    287,304.20x = 431,030.40 × 137,659.96
  4. Step 4: Simplify right side
    287,304.20x = 59,335,627,622.78
  5. Step 5: Solve for x
    x = 59,335,627,622.78/287,304.20
  6. Step 6: Final answer
    x = 206,525.44

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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.