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Finding the Fourth Proportional to 805,959.20, 1,208,593.20 and 406,445.60

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Solution

The fourth proportional to 805,959.20, 1,208,593.20 and 406,445.60 is: 609,494.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,959.20 : 1,208,593.20 = 406,445.60 : x
  2. Step 2: Convert to fraction form
    805,959.20/1,208,593.20 = 406,445.60/x
  3. Step 3: Cross multiply
    805,959.20x = 1,208,593.20 × 406,445.60
  4. Step 4: Simplify right side
    805,959.20x = 491,227,388,329.92
  5. Step 5: Solve for x
    x = 491,227,388,329.92/805,959.20
  6. Step 6: Final answer
    x = 609,494.11

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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.