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Finding the Fourth Proportional to 290,449.29, 435,844.46 and 121,956.66

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Solution

The fourth proportional to 290,449.29, 435,844.46 and 121,956.66 is: 183,006.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,449.29 : 435,844.46 = 121,956.66 : x
  2. Step 2: Convert to fraction form
    290,449.29/435,844.46 = 121,956.66/x
  3. Step 3: Cross multiply
    290,449.29x = 435,844.46 × 121,956.66
  4. Step 4: Simplify right side
    290,449.29x = 53,154,134,011.32
  5. Step 5: Solve for x
    x = 53,154,134,011.32/290,449.29
  6. Step 6: Final answer
    x = 183,006.59

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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.