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Finding the Fourth Proportional to 290,334.11, 435,500.96 and 90,671.61

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Solution

The fourth proportional to 290,334.11, 435,500.96 and 90,671.61 is: 136,007.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,334.11 : 435,500.96 = 90,671.61 : x
  2. Step 2: Convert to fraction form
    290,334.11/435,500.96 = 90,671.61/x
  3. Step 3: Cross multiply
    290,334.11x = 435,500.96 × 90,671.61
  4. Step 4: Simplify right side
    290,334.11x = 39,487,573,426.42
  5. Step 5: Solve for x
    x = 39,487,573,426.42/290,334.11
  6. Step 6: Final answer
    x = 136,007.35

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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.