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Finding the Fourth Proportional to 443,342.20, 665,013.30 and 256,257.40

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Solution

The fourth proportional to 443,342.20, 665,013.30 and 256,257.40 is: 384,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,342.20 : 665,013.30 = 256,257.40 : x
  2. Step 2: Convert to fraction form
    443,342.20/665,013.30 = 256,257.40/x
  3. Step 3: Cross multiply
    443,342.20x = 665,013.30 × 256,257.40
  4. Step 4: Simplify right side
    443,342.20x = 170,414,579,223.42
  5. Step 5: Solve for x
    x = 170,414,579,223.42/443,342.20
  6. Step 6: Final answer
    x = 384,386.10

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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.