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Finding the Fourth Proportional to 331,507.64, 497,335.74 and 121,140.20

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Solution

The fourth proportional to 331,507.64, 497,335.74 and 121,140.20 is: 181,737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,507.64 : 497,335.74 = 121,140.20 : x
  2. Step 2: Convert to fraction form
    331,507.64/497,335.74 = 121,140.20/x
  3. Step 3: Cross multiply
    331,507.64x = 497,335.74 × 121,140.20
  4. Step 4: Simplify right side
    331,507.64x = 60,247,351,010.75
  5. Step 5: Solve for x
    x = 60,247,351,010.75/331,507.64
  6. Step 6: Final answer
    x = 181,737.44

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1.5x scale

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.