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Finding the Fourth Proportional to 480,645.50, 721,009.15 and 125,658.95

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Solution

The fourth proportional to 480,645.50, 721,009.15 and 125,658.95 is: 188,499.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,645.50 : 721,009.15 = 125,658.95 : x
  2. Step 2: Convert to fraction form
    480,645.50/721,009.15 = 125,658.95/x
  3. Step 3: Cross multiply
    480,645.50x = 721,009.15 × 125,658.95
  4. Step 4: Simplify right side
    480,645.50x = 90,601,248,810.20
  5. Step 5: Solve for x
    x = 90,601,248,810.20/480,645.50
  6. Step 6: Final answer
    x = 188,499.11

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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.