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Finding the Fourth Proportional to 869,138.60, 1,301,958.30 and 448,651.40

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Solution

The fourth proportional to 869,138.60, 1,301,958.30 and 448,651.40 is: 672,073.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,138.60 : 1,301,958.30 = 448,651.40 : x
  2. Step 2: Convert to fraction form
    869,138.60/1,301,958.30 = 448,651.40/x
  3. Step 3: Cross multiply
    869,138.60x = 1,301,958.30 × 448,651.40
  4. Step 4: Simplify right side
    869,138.60x = 584,125,414,036.62
  5. Step 5: Solve for x
    x = 584,125,414,036.62/869,138.60
  6. Step 6: Final answer
    x = 672,073.95

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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.