Home / 426,428.10-639,469.35-145,800.90

Finding the Fourth Proportional to 426,428.10, 639,469.35 and 145,800.90

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Solution

The fourth proportional to 426,428.10, 639,469.35 and 145,800.90 is: 218,642.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,428.10 : 639,469.35 = 145,800.90 : x
  2. Step 2: Convert to fraction form
    426,428.10/639,469.35 = 145,800.90/x
  3. Step 3: Cross multiply
    426,428.10x = 639,469.35 × 145,800.90
  4. Step 4: Simplify right side
    426,428.10x = 93,235,206,752.42
  5. Step 5: Solve for x
    x = 93,235,206,752.42/426,428.10
  6. Step 6: Final answer
    x = 218,642.27

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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.