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Finding the Fourth Proportional to 420,370.29, 580,127.40 and 239,098.77

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Solution

The fourth proportional to 420,370.29, 580,127.40 and 239,098.77 is: 329,965.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,370.29 : 580,127.40 = 239,098.77 : x
  2. Step 2: Convert to fraction form
    420,370.29/580,127.40 = 239,098.77/x
  3. Step 3: Cross multiply
    420,370.29x = 580,127.40 × 239,098.77
  4. Step 4: Simplify right side
    420,370.29x = 138,707,747,783.30
  5. Step 5: Solve for x
    x = 138,707,747,783.30/420,370.29
  6. Step 6: Final answer
    x = 329,965.63

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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.