Home / 420,766.63-631,182.95-140,283.88

Finding the Fourth Proportional to 420,766.63, 631,182.95 and 140,283.88

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Solution

The fourth proportional to 420,766.63, 631,182.95 and 140,283.88 is: 210,436.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,766.63 : 631,182.95 = 140,283.88 : x
  2. Step 2: Convert to fraction form
    420,766.63/631,182.95 = 140,283.88/x
  3. Step 3: Cross multiply
    420,766.63x = 631,182.95 × 140,283.88
  4. Step 4: Simplify right side
    420,766.63x = 88,544,793,215.85
  5. Step 5: Solve for x
    x = 88,544,793,215.85/420,766.63
  6. Step 6: Final answer
    x = 210,436.82

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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.