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Finding the Fourth Proportional to 431,645.25, 647,526.96 and 147,259.45

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Solution

The fourth proportional to 431,645.25, 647,526.96 and 147,259.45 is: 220,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,645.25 : 647,526.96 = 147,259.45 : x
  2. Step 2: Convert to fraction form
    431,645.25/647,526.96 = 147,259.45/x
  3. Step 3: Cross multiply
    431,645.25x = 647,526.96 × 147,259.45
  4. Step 4: Simplify right side
    431,645.25x = 95,354,464,799.18
  5. Step 5: Solve for x
    x = 95,354,464,799.18/431,645.25
  6. Step 6: Final answer
    x = 220,909.33

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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.