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Finding the Fourth Proportional to 331,479.40, 497,291.10 and 121,117

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Solution

The fourth proportional to 331,479.40, 497,291.10 and 121,117 is: 181,701.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,479.40 : 497,291.10 = 121,117 : x
  2. Step 2: Convert to fraction form
    331,479.40/497,291.10 = 121,117/x
  3. Step 3: Cross multiply
    331,479.40x = 497,291.10 × 121,117
  4. Step 4: Simplify right side
    331,479.40x = 60,230,406,158.70
  5. Step 5: Solve for x
    x = 60,230,406,158.70/331,479.40
  6. Step 6: Final answer
    x = 181,701.81

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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.