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Finding the Fourth Proportional to 398,562.20, 558,401.80 and 398,562.20

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Solution

The fourth proportional to 398,562.20, 558,401.80 and 398,562.20 is: 558,401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,562.20 : 558,401.80 = 398,562.20 : x
  2. Step 2: Convert to fraction form
    398,562.20/558,401.80 = 398,562.20/x
  3. Step 3: Cross multiply
    398,562.20x = 558,401.80 × 398,562.20
  4. Step 4: Simplify right side
    398,562.20x = 222,557,849,891.96
  5. Step 5: Solve for x
    x = 222,557,849,891.96/398,562.20
  6. Step 6: Final answer
    x = 558,401.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.