Home / 420,247.89-579,939.40-238,959.87

Finding the Fourth Proportional to 420,247.89, 579,939.40 and 238,959.87

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Solution

The fourth proportional to 420,247.89, 579,939.40 and 238,959.87 is: 329,763.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,247.89 : 579,939.40 = 238,959.87 : x
  2. Step 2: Convert to fraction form
    420,247.89/579,939.40 = 238,959.87/x
  3. Step 3: Cross multiply
    420,247.89x = 579,939.40 × 238,959.87
  4. Step 4: Simplify right side
    420,247.89x = 138,582,239,537.38
  5. Step 5: Solve for x
    x = 138,582,239,537.38/420,247.89
  6. Step 6: Final answer
    x = 329,763.08

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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.