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Finding the Fourth Proportional to 317,422.83, 438,043.28 and 181,459.78

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Solution

The fourth proportional to 317,422.83, 438,043.28 and 181,459.78 is: 250,414.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,422.83 : 438,043.28 = 181,459.78 : x
  2. Step 2: Convert to fraction form
    317,422.83/438,043.28 = 181,459.78/x
  3. Step 3: Cross multiply
    317,422.83x = 438,043.28 × 181,459.78
  4. Step 4: Simplify right side
    317,422.83x = 79,487,235,216.87
  5. Step 5: Solve for x
    x = 79,487,235,216.87/317,422.83
  6. Step 6: Final answer
    x = 250,414.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.