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Finding the Fourth Proportional to 398,393.76, 597,707.46 and 128,516.50

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Solution

The fourth proportional to 398,393.76, 597,707.46 and 128,516.50 is: 192,812.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,393.76 : 597,707.46 = 128,516.50 : x
  2. Step 2: Convert to fraction form
    398,393.76/597,707.46 = 128,516.50/x
  3. Step 3: Cross multiply
    398,393.76x = 597,707.46 × 128,516.50
  4. Step 4: Simplify right side
    398,393.76x = 76,815,267,794.55
  5. Step 5: Solve for x
    x = 76,815,267,794.55/398,393.76
  6. Step 6: Final answer
    x = 192,812.43

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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.