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Finding the Fourth Proportional to 331,679.70, 497,410.20 and 121,290.30

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Solution

The fourth proportional to 331,679.70, 497,410.20 and 121,290.30 is: 181,895.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,679.70 : 497,410.20 = 121,290.30 : x
  2. Step 2: Convert to fraction form
    331,679.70/497,410.20 = 121,290.30/x
  3. Step 3: Cross multiply
    331,679.70x = 497,410.20 × 121,290.30
  4. Step 4: Simplify right side
    331,679.70x = 60,331,032,381.06
  5. Step 5: Solve for x
    x = 60,331,032,381.06/331,679.70
  6. Step 6: Final answer
    x = 181,895.46

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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.