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Finding the Fourth Proportional to 290,836.55, 436,264.55 and 80,456.87

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Solution

The fourth proportional to 290,836.55, 436,264.55 and 80,456.87 is: 120,688.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,836.55 : 436,264.55 = 80,456.87 : x
  2. Step 2: Convert to fraction form
    290,836.55/436,264.55 = 80,456.87/x
  3. Step 3: Cross multiply
    290,836.55x = 436,264.55 × 80,456.87
  4. Step 4: Simplify right side
    290,836.55x = 35,100,480,184.96
  5. Step 5: Solve for x
    x = 35,100,480,184.96/290,836.55
  6. Step 6: Final answer
    x = 120,688.00

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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.