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Finding the Fourth Proportional to 312,539.02, 431,294.96 and 183,475.42

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Solution

The fourth proportional to 312,539.02, 431,294.96 and 183,475.42 is: 253,190.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,539.02 : 431,294.96 = 183,475.42 : x
  2. Step 2: Convert to fraction form
    312,539.02/431,294.96 = 183,475.42/x
  3. Step 3: Cross multiply
    312,539.02x = 431,294.96 × 183,475.42
  4. Step 4: Simplify right side
    312,539.02x = 79,132,023,929.88
  5. Step 5: Solve for x
    x = 79,132,023,929.88/312,539.02
  6. Step 6: Final answer
    x = 253,190.86

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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.