Home / 431,724.80-647,587.20-405,459.20

Finding the Fourth Proportional to 431,724.80, 647,587.20 and 405,459.20

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Solution

The fourth proportional to 431,724.80, 647,587.20 and 405,459.20 is: 608,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,724.80 : 647,587.20 = 405,459.20 : x
  2. Step 2: Convert to fraction form
    431,724.80/647,587.20 = 405,459.20/x
  3. Step 3: Cross multiply
    431,724.80x = 647,587.20 × 405,459.20
  4. Step 4: Simplify right side
    431,724.80x = 262,570,188,042.24
  5. Step 5: Solve for x
    x = 262,570,188,042.24/431,724.80
  6. Step 6: Final answer
    x = 608,188.80

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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.