Home / 420,231.12-579,946.38-238,959.96

Finding the Fourth Proportional to 420,231.12, 579,946.38 and 238,959.96

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Solution

The fourth proportional to 420,231.12, 579,946.38 and 238,959.96 is: 329,780.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,231.12 : 579,946.38 = 238,959.96 : x
  2. Step 2: Convert to fraction form
    420,231.12/579,946.38 = 238,959.96/x
  3. Step 3: Cross multiply
    420,231.12x = 579,946.38 × 238,959.96
  4. Step 4: Simplify right side
    420,231.12x = 138,583,963,766.95
  5. Step 5: Solve for x
    x = 138,583,963,766.95/420,231.12
  6. Step 6: Final answer
    x = 329,780.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.