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Finding the Fourth Proportional to 290,389.92, 435,569.22 and 90,687.42

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Solution

The fourth proportional to 290,389.92, 435,569.22 and 90,687.42 is: 136,026.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,389.92 : 435,569.22 = 90,687.42 : x
  2. Step 2: Convert to fraction form
    290,389.92/435,569.22 = 90,687.42/x
  3. Step 3: Cross multiply
    290,389.92x = 435,569.22 × 90,687.42
  4. Step 4: Simplify right side
    290,389.92x = 39,500,648,793.21
  5. Step 5: Solve for x
    x = 39,500,648,793.21/290,389.92
  6. Step 6: Final answer
    x = 136,026.24

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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.