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Finding the Fourth Proportional to 443,721.90, 664,708.05 and 265,700.10

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Solution

The fourth proportional to 443,721.90, 664,708.05 and 265,700.10 is: 398,026.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,721.90 : 664,708.05 = 265,700.10 : x
  2. Step 2: Convert to fraction form
    443,721.90/664,708.05 = 265,700.10/x
  3. Step 3: Cross multiply
    443,721.90x = 664,708.05 × 265,700.10
  4. Step 4: Simplify right side
    443,721.90x = 176,612,995,355.81
  5. Step 5: Solve for x
    x = 176,612,995,355.81/443,721.90
  6. Step 6: Final answer
    x = 398,026.32

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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.