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Finding the Fourth Proportional to 290,543.29, 435,565.31 and 100,979.03

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Solution

The fourth proportional to 290,543.29, 435,565.31 and 100,979.03 is: 151,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,543.29 : 435,565.31 = 100,979.03 : x
  2. Step 2: Convert to fraction form
    290,543.29/435,565.31 = 100,979.03/x
  3. Step 3: Cross multiply
    290,543.29x = 435,565.31 × 100,979.03
  4. Step 4: Simplify right side
    290,543.29x = 43,982,963,089.47
  5. Step 5: Solve for x
    x = 43,982,963,089.47/290,543.29
  6. Step 6: Final answer
    x = 151,381.79

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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.