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Finding the Fourth Proportional to 398,820.68, 550,061.46 and 255,594.12

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Solution

The fourth proportional to 398,820.68, 550,061.46 and 255,594.12 is: 352,520.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,820.68 : 550,061.46 = 255,594.12 : x
  2. Step 2: Convert to fraction form
    398,820.68/550,061.46 = 255,594.12/x
  3. Step 3: Cross multiply
    398,820.68x = 550,061.46 × 255,594.12
  4. Step 4: Simplify right side
    398,820.68x = 140,592,474,814.62
  5. Step 5: Solve for x
    x = 140,592,474,814.62/398,820.68
  6. Step 6: Final answer
    x = 352,520.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.