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Finding the Fourth Proportional to 287,766.90, 431,650.35 and 271,437.30

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Solution

The fourth proportional to 287,766.90, 431,650.35 and 271,437.30 is: 407,155.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,766.90 : 431,650.35 = 271,437.30 : x
  2. Step 2: Convert to fraction form
    287,766.90/431,650.35 = 271,437.30/x
  3. Step 3: Cross multiply
    287,766.90x = 431,650.35 × 271,437.30
  4. Step 4: Simplify right side
    287,766.90x = 117,166,005,548.06
  5. Step 5: Solve for x
    x = 117,166,005,548.06/287,766.90
  6. Step 6: Final answer
    x = 407,155.95

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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.