Home / 420,279.90-579,983.40-238,991.82

Finding the Fourth Proportional to 420,279.90, 579,983.40 and 238,991.82

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Solution

The fourth proportional to 420,279.90, 579,983.40 and 238,991.82 is: 329,807.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,279.90 : 579,983.40 = 238,991.82 : x
  2. Step 2: Convert to fraction form
    420,279.90/579,983.40 = 238,991.82/x
  3. Step 3: Cross multiply
    420,279.90x = 579,983.40 × 238,991.82
  4. Step 4: Simplify right side
    420,279.90x = 138,611,288,335.79
  5. Step 5: Solve for x
    x = 138,611,288,335.79/420,279.90
  6. Step 6: Final answer
    x = 329,807.08

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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.