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Finding the Fourth Proportional to 331,319.20, 497,108.40 and 120,978.40

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Solution

The fourth proportional to 331,319.20, 497,108.40 and 120,978.40 is: 181,514.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,319.20 : 497,108.40 = 120,978.40 : x
  2. Step 2: Convert to fraction form
    331,319.20/497,108.40 = 120,978.40/x
  3. Step 3: Cross multiply
    331,319.20x = 497,108.40 × 120,978.40
  4. Step 4: Simplify right side
    331,319.20x = 60,139,378,858.56
  5. Step 5: Solve for x
    x = 60,139,378,858.56/331,319.20
  6. Step 6: Final answer
    x = 181,514.92

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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.