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Finding the Fourth Proportional to 290,639.01, 435,983.54 and 80,276.97

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Solution

The fourth proportional to 290,639.01, 435,983.54 and 80,276.97 is: 120,422.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,639.01 : 435,983.54 = 80,276.97 : x
  2. Step 2: Convert to fraction form
    290,639.01/435,983.54 = 80,276.97/x
  3. Step 3: Cross multiply
    290,639.01x = 435,983.54 × 80,276.97
  4. Step 4: Simplify right side
    290,639.01x = 34,999,437,159.69
  5. Step 5: Solve for x
    x = 34,999,437,159.69/290,639.01
  6. Step 6: Final answer
    x = 120,422.37

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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.