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Finding the Fourth Proportional to 644,652.20, 889,729.63 and 372,885.32

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Solution

The fourth proportional to 644,652.20, 889,729.63 and 372,885.32 is: 514,645.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,652.20 : 889,729.63 = 372,885.32 : x
  2. Step 2: Convert to fraction form
    644,652.20/889,729.63 = 372,885.32/x
  3. Step 3: Cross multiply
    644,652.20x = 889,729.63 × 372,885.32
  4. Step 4: Simplify right side
    644,652.20x = 331,767,119,088.14
  5. Step 5: Solve for x
    x = 331,767,119,088.14/644,652.20
  6. Step 6: Final answer
    x = 514,645.13

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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.