Home / 386,721.40-580,082.10-381,472.60

Finding the Fourth Proportional to 386,721.40, 580,082.10 and 381,472.60

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Solution

The fourth proportional to 386,721.40, 580,082.10 and 381,472.60 is: 572,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,721.40 : 580,082.10 = 381,472.60 : x
  2. Step 2: Convert to fraction form
    386,721.40/580,082.10 = 381,472.60/x
  3. Step 3: Cross multiply
    386,721.40x = 580,082.10 × 381,472.60
  4. Step 4: Simplify right side
    386,721.40x = 221,285,426,900.46
  5. Step 5: Solve for x
    x = 221,285,426,900.46/386,721.40
  6. Step 6: Final answer
    x = 572,208.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.