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Finding the Fourth Proportional to 331,405.20, 497,237.40 and 121,064.40

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Solution

The fourth proportional to 331,405.20, 497,237.40 and 121,064.40 is: 181,643.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,405.20 : 497,237.40 = 121,064.40 : x
  2. Step 2: Convert to fraction form
    331,405.20/497,237.40 = 121,064.40/x
  3. Step 3: Cross multiply
    331,405.20x = 497,237.40 × 121,064.40
  4. Step 4: Simplify right side
    331,405.20x = 60,197,747,488.56
  5. Step 5: Solve for x
    x = 60,197,747,488.56/331,405.20
  6. Step 6: Final answer
    x = 181,643.94

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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.