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Finding the Fourth Proportional to 644,839.74, 889,808.10 and 372,866.40

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Solution

The fourth proportional to 644,839.74, 889,808.10 and 372,866.40 is: 514,514.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,839.74 : 889,808.10 = 372,866.40 : x
  2. Step 2: Convert to fraction form
    644,839.74/889,808.10 = 372,866.40/x
  3. Step 3: Cross multiply
    644,839.74x = 889,808.10 × 372,866.40
  4. Step 4: Simplify right side
    644,839.74x = 331,779,542,937.84
  5. Step 5: Solve for x
    x = 331,779,542,937.84/644,839.74
  6. Step 6: Final answer
    x = 514,514.73

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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.