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Finding the Fourth Proportional to 290,931.52, 436,347.78 and 80,520.16

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Solution

The fourth proportional to 290,931.52, 436,347.78 and 80,520.16 is: 120,766.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,931.52 : 436,347.78 = 80,520.16 : x
  2. Step 2: Convert to fraction form
    290,931.52/436,347.78 = 80,520.16/x
  3. Step 3: Cross multiply
    290,931.52x = 436,347.78 × 80,520.16
  4. Step 4: Simplify right side
    290,931.52x = 35,134,793,061.24
  5. Step 5: Solve for x
    x = 35,134,793,061.24/290,931.52
  6. Step 6: Final answer
    x = 120,766.54

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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.