Home / 421,414.20-631,989.54-140,865.84

Finding the Fourth Proportional to 421,414.20, 631,989.54 and 140,865.84

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Solution

The fourth proportional to 421,414.20, 631,989.54 and 140,865.84 is: 211,254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,414.20 : 631,989.54 = 140,865.84 : x
  2. Step 2: Convert to fraction form
    421,414.20/631,989.54 = 140,865.84/x
  3. Step 3: Cross multiply
    421,414.20x = 631,989.54 × 140,865.84
  4. Step 4: Simplify right side
    421,414.20x = 89,025,737,423.31
  5. Step 5: Solve for x
    x = 89,025,737,423.31/421,414.20
  6. Step 6: Final answer
    x = 211,254.72

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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.