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Finding the Fourth Proportional to 331,461.20, 497,256.60 and 141,921.20

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Solution

The fourth proportional to 331,461.20, 497,256.60 and 141,921.20 is: 212,909.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,461.20 : 497,256.60 = 141,921.20 : x
  2. Step 2: Convert to fraction form
    331,461.20/497,256.60 = 141,921.20/x
  3. Step 3: Cross multiply
    331,461.20x = 497,256.60 × 141,921.20
  4. Step 4: Simplify right side
    331,461.20x = 70,571,253,379.92
  5. Step 5: Solve for x
    x = 70,571,253,379.92/331,461.20
  6. Step 6: Final answer
    x = 212,909.55

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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.