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Finding the Fourth Proportional to 472,485.80, 708,275.10 and 156,780.20

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Solution

The fourth proportional to 472,485.80, 708,275.10 and 156,780.20 is: 235,019.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,485.80 : 708,275.10 = 156,780.20 : x
  2. Step 2: Convert to fraction form
    472,485.80/708,275.10 = 156,780.20/x
  3. Step 3: Cross multiply
    472,485.80x = 708,275.10 × 156,780.20
  4. Step 4: Simplify right side
    472,485.80x = 111,043,511,833.02
  5. Step 5: Solve for x
    x = 111,043,511,833.02/472,485.80
  6. Step 6: Final answer
    x = 235,019.79

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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.