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Finding the Fourth Proportional to 398,981.40, 597,665.70 and 248,760.60

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Solution

The fourth proportional to 398,981.40, 597,665.70 and 248,760.60 is: 372,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,981.40 : 597,665.70 = 248,760.60 : x
  2. Step 2: Convert to fraction form
    398,981.40/597,665.70 = 248,760.60/x
  3. Step 3: Cross multiply
    398,981.40x = 597,665.70 × 248,760.60
  4. Step 4: Simplify right side
    398,981.40x = 148,675,678,131.42
  5. Step 5: Solve for x
    x = 148,675,678,131.42/398,981.40
  6. Step 6: Final answer
    x = 372,638.12

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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.