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Finding the Fourth Proportional to 576,638.70, 865,832.85 and 443,669.10

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Solution

The fourth proportional to 576,638.70, 865,832.85 and 443,669.10 is: 666,176.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,638.70 : 865,832.85 = 443,669.10 : x
  2. Step 2: Convert to fraction form
    576,638.70/865,832.85 = 443,669.10/x
  3. Step 3: Cross multiply
    576,638.70x = 865,832.85 × 443,669.10
  4. Step 4: Simplify right side
    576,638.70x = 384,143,281,309.94
  5. Step 5: Solve for x
    x = 384,143,281,309.94/576,638.70
  6. Step 6: Final answer
    x = 666,176.73

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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.