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Finding the Fourth Proportional to 331,539.60, 497,309.40 and 121,328.40

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Solution

The fourth proportional to 331,539.60, 497,309.40 and 121,328.40 is: 181,992.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,539.60 : 497,309.40 = 121,328.40 : x
  2. Step 2: Convert to fraction form
    331,539.60/497,309.40 = 121,328.40/x
  3. Step 3: Cross multiply
    331,539.60x = 497,309.40 × 121,328.40
  4. Step 4: Simplify right side
    331,539.60x = 60,337,753,806.96
  5. Step 5: Solve for x
    x = 60,337,753,806.96/331,539.60
  6. Step 6: Final answer
    x = 181,992.60

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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.