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Finding the Fourth Proportional to 290,508.40, 435,787.71 and 80,146.34

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Solution

The fourth proportional to 290,508.40, 435,787.71 and 80,146.34 is: 120,226.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,508.40 : 435,787.71 = 80,146.34 : x
  2. Step 2: Convert to fraction form
    290,508.40/435,787.71 = 80,146.34/x
  3. Step 3: Cross multiply
    290,508.40x = 435,787.71 × 80,146.34
  4. Step 4: Simplify right side
    290,508.40x = 34,926,789,773.12
  5. Step 5: Solve for x
    x = 34,926,789,773.12/290,508.40
  6. Step 6: Final answer
    x = 120,226.44

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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.