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Finding the Fourth Proportional to 403,345.20, 605,212.20 and 284,761.20

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Solution

The fourth proportional to 403,345.20, 605,212.20 and 284,761.20 is: 427,279.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,345.20 : 605,212.20 = 284,761.20 : x
  2. Step 2: Convert to fraction form
    403,345.20/605,212.20 = 284,761.20/x
  3. Step 3: Cross multiply
    403,345.20x = 605,212.20 × 284,761.20
  4. Step 4: Simplify right side
    403,345.20x = 172,340,952,326.64
  5. Step 5: Solve for x
    x = 172,340,952,326.64/403,345.20
  6. Step 6: Final answer
    x = 427,279.05

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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.