Home / 398,678.28-598,118.40-132,440.10

Finding the Fourth Proportional to 398,678.28, 598,118.40 and 132,440.10

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Solution

The fourth proportional to 398,678.28, 598,118.40 and 132,440.10 is: 198,693.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,678.28 : 598,118.40 = 132,440.10 : x
  2. Step 2: Convert to fraction form
    398,678.28/598,118.40 = 132,440.10/x
  3. Step 3: Cross multiply
    398,678.28x = 598,118.40 × 132,440.10
  4. Step 4: Simplify right side
    398,678.28x = 79,214,860,707.84
  5. Step 5: Solve for x
    x = 79,214,860,707.84/398,678.28
  6. Step 6: Final answer
    x = 198,693.70

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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.