Home / 642,548.16-886,721.76-356,073.12

Finding the Fourth Proportional to 642,548.16, 886,721.76 and 356,073.12

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Solution

The fourth proportional to 642,548.16, 886,721.76 and 356,073.12 is: 491,383.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,548.16 : 886,721.76 = 356,073.12 : x
  2. Step 2: Convert to fraction form
    642,548.16/886,721.76 = 356,073.12/x
  3. Step 3: Cross multiply
    642,548.16x = 886,721.76 × 356,073.12
  4. Step 4: Simplify right side
    642,548.16x = 315,737,783,655.09
  5. Step 5: Solve for x
    x = 315,737,783,655.09/642,548.16
  6. Step 6: Final answer
    x = 491,383.84

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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.