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Finding the Fourth Proportional to 443,138.40, 664,707.60 and 398,901.60

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Solution

The fourth proportional to 443,138.40, 664,707.60 and 398,901.60 is: 598,352.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,138.40 : 664,707.60 = 398,901.60 : x
  2. Step 2: Convert to fraction form
    443,138.40/664,707.60 = 398,901.60/x
  3. Step 3: Cross multiply
    443,138.40x = 664,707.60 × 398,901.60
  4. Step 4: Simplify right side
    443,138.40x = 265,152,925,172.16
  5. Step 5: Solve for x
    x = 265,152,925,172.16/443,138.40
  6. Step 6: Final answer
    x = 598,352.40

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Similar ratio
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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.