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Finding the Fourth Proportional to 443,438.60, 664,428.30 and 256,123.40

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Solution

The fourth proportional to 443,438.60, 664,428.30 and 256,123.40 is: 383,763.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,438.60 : 664,428.30 = 256,123.40 : x
  2. Step 2: Convert to fraction form
    443,438.60/664,428.30 = 256,123.40/x
  3. Step 3: Cross multiply
    443,438.60x = 664,428.30 × 256,123.40
  4. Step 4: Simplify right side
    443,438.60x = 170,175,635,252.22
  5. Step 5: Solve for x
    x = 170,175,635,252.22/443,438.60
  6. Step 6: Final answer
    x = 383,763.69

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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.