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Finding the Fourth Proportional to 443,441.60, 664,432.80 and 256,126.40

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Solution

The fourth proportional to 443,441.60, 664,432.80 and 256,126.40 is: 383,768.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,441.60 : 664,432.80 = 256,126.40 : x
  2. Step 2: Convert to fraction form
    443,441.60/664,432.80 = 256,126.40/x
  3. Step 3: Cross multiply
    443,441.60x = 664,432.80 × 256,126.40
  4. Step 4: Simplify right side
    443,441.60x = 170,178,781,105.92
  5. Step 5: Solve for x
    x = 170,178,781,105.92/443,441.60
  6. Step 6: Final answer
    x = 383,768.19

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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.