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Finding the Fourth Proportional to 781,651.60, 1,172,866.20 and 308,352.40

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Solution

The fourth proportional to 781,651.60, 1,172,866.20 and 308,352.40 is: 462,681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,651.60 : 1,172,866.20 = 308,352.40 : x
  2. Step 2: Convert to fraction form
    781,651.60/1,172,866.20 = 308,352.40/x
  3. Step 3: Cross multiply
    781,651.60x = 1,172,866.20 × 308,352.40
  4. Step 4: Simplify right side
    781,651.60x = 361,656,107,648.88
  5. Step 5: Solve for x
    x = 361,656,107,648.88/781,651.60
  6. Step 6: Final answer
    x = 462,681.98

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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.