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Finding the Fourth Proportional to 290,383.92, 435,560.22 and 90,681.39

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Solution

The fourth proportional to 290,383.92, 435,560.22 and 90,681.39 is: 136,017.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,383.92 : 435,560.22 = 90,681.39 : x
  2. Step 2: Convert to fraction form
    290,383.92/435,560.22 = 90,681.39/x
  3. Step 3: Cross multiply
    290,383.92x = 435,560.22 × 90,681.39
  4. Step 4: Simplify right side
    290,383.92x = 39,497,206,178.31
  5. Step 5: Solve for x
    x = 39,497,206,178.31/290,383.92
  6. Step 6: Final answer
    x = 136,017.19

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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.