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Finding the Fourth Proportional to 443,374.20, 665,061.30 and 256,289.40

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Solution

The fourth proportional to 443,374.20, 665,061.30 and 256,289.40 is: 384,434.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,374.20 : 665,061.30 = 256,289.40 : x
  2. Step 2: Convert to fraction form
    443,374.20/665,061.30 = 256,289.40/x
  3. Step 3: Cross multiply
    443,374.20x = 665,061.30 × 256,289.40
  4. Step 4: Simplify right side
    443,374.20x = 170,448,161,540.22
  5. Step 5: Solve for x
    x = 170,448,161,540.22/443,374.20
  6. Step 6: Final answer
    x = 384,434.10

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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.