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Finding the Fourth Proportional to 644,248.80, 889,064.76 and 357,768.90

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Solution

The fourth proportional to 644,248.80, 889,064.76 and 357,768.90 is: 493,721.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,248.80 : 889,064.76 = 357,768.90 : x
  2. Step 2: Convert to fraction form
    644,248.80/889,064.76 = 357,768.90/x
  3. Step 3: Cross multiply
    644,248.80x = 889,064.76 × 357,768.90
  4. Step 4: Simplify right side
    644,248.80x = 318,079,721,213.96
  5. Step 5: Solve for x
    x = 318,079,721,213.96/644,248.80
  6. Step 6: Final answer
    x = 493,721.87

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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.