Home / 765,587.22-1,149,178.85-339,422.32

Finding the Fourth Proportional to 765,587.22, 1,149,178.85 and 339,422.32

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Solution

The fourth proportional to 765,587.22, 1,149,178.85 and 339,422.32 is: 509,487.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,587.22 : 1,149,178.85 = 339,422.32 : x
  2. Step 2: Convert to fraction form
    765,587.22/1,149,178.85 = 339,422.32/x
  3. Step 3: Cross multiply
    765,587.22x = 1,149,178.85 × 339,422.32
  4. Step 4: Simplify right side
    765,587.22x = 390,056,947,819.25
  5. Step 5: Solve for x
    x = 390,056,947,819.25/765,587.22
  6. Step 6: Final answer
    x = 509,487.28

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1.5x scale

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.