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Finding the Fourth Proportional to 287,992.80, 431,989.20 and 182,930.40

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Solution

The fourth proportional to 287,992.80, 431,989.20 and 182,930.40 is: 274,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,992.80 : 431,989.20 = 182,930.40 : x
  2. Step 2: Convert to fraction form
    287,992.80/431,989.20 = 182,930.40/x
  3. Step 3: Cross multiply
    287,992.80x = 431,989.20 × 182,930.40
  4. Step 4: Simplify right side
    287,992.80x = 79,023,957,151.68
  5. Step 5: Solve for x
    x = 79,023,957,151.68/287,992.80
  6. Step 6: Final answer
    x = 274,395.60

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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.