Home / 420,081.30-579,689.10-238,768.02

Finding the Fourth Proportional to 420,081.30, 579,689.10 and 238,768.02

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Solution

The fourth proportional to 420,081.30, 579,689.10 and 238,768.02 is: 329,486.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,081.30 : 579,689.10 = 238,768.02 : x
  2. Step 2: Convert to fraction form
    420,081.30/579,689.10 = 238,768.02/x
  3. Step 3: Cross multiply
    420,081.30x = 579,689.10 × 238,768.02
  4. Step 4: Simplify right side
    420,081.30x = 138,411,218,622.58
  5. Step 5: Solve for x
    x = 138,411,218,622.58/420,081.30
  6. Step 6: Final answer
    x = 329,486.74

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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.