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Finding the Fourth Proportional to 443,442.60, 664,434.30 and 256,127.40

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Solution

The fourth proportional to 443,442.60, 664,434.30 and 256,127.40 is: 383,769.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,442.60 : 664,434.30 = 256,127.40 : x
  2. Step 2: Convert to fraction form
    443,442.60/664,434.30 = 256,127.40/x
  3. Step 3: Cross multiply
    443,442.60x = 664,434.30 × 256,127.40
  4. Step 4: Simplify right side
    443,442.60x = 170,179,829,729.82
  5. Step 5: Solve for x
    x = 170,179,829,729.82/443,442.60
  6. Step 6: Final answer
    x = 383,769.69

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1.5x scale

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.