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Finding the Fourth Proportional to 443,726.80, 665,201.40 and 266,045.20

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Solution

The fourth proportional to 443,726.80, 665,201.40 and 266,045.20 is: 398,834.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,726.80 : 665,201.40 = 266,045.20 : x
  2. Step 2: Convert to fraction form
    443,726.80/665,201.40 = 266,045.20/x
  3. Step 3: Cross multiply
    443,726.80x = 665,201.40 × 266,045.20
  4. Step 4: Simplify right side
    443,726.80x = 176,973,639,503.28
  5. Step 5: Solve for x
    x = 176,973,639,503.28/443,726.80
  6. Step 6: Final answer
    x = 398,834.69

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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.