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Finding the Fourth Proportional to 290,875.76, 436,265.04 and 80,534.96

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Solution

The fourth proportional to 290,875.76, 436,265.04 and 80,534.96 is: 120,788.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,875.76 : 436,265.04 = 80,534.96 : x
  2. Step 2: Convert to fraction form
    290,875.76/436,265.04 = 80,534.96/x
  3. Step 3: Cross multiply
    290,875.76x = 436,265.04 × 80,534.96
  4. Step 4: Simplify right side
    290,875.76x = 35,134,587,545.80
  5. Step 5: Solve for x
    x = 35,134,587,545.80/290,875.76
  6. Step 6: Final answer
    x = 120,788.98

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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.