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Finding the Fourth Proportional to 317,672.40, 438,427.41 and 181,687.47

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Solution

The fourth proportional to 317,672.40, 438,427.41 and 181,687.47 is: 250,751.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,672.40 : 438,427.41 = 181,687.47 : x
  2. Step 2: Convert to fraction form
    317,672.40/438,427.41 = 181,687.47/x
  3. Step 3: Cross multiply
    317,672.40x = 438,427.41 × 181,687.47
  4. Step 4: Simplify right side
    317,672.40x = 79,656,766,901.55
  5. Step 5: Solve for x
    x = 79,656,766,901.55/317,672.40
  6. Step 6: Final answer
    x = 250,751.30

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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.