Home / 426,388.60-639,410.10-145,761.40

Finding the Fourth Proportional to 426,388.60, 639,410.10 and 145,761.40

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Solution

The fourth proportional to 426,388.60, 639,410.10 and 145,761.40 is: 218,583.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,388.60 : 639,410.10 = 145,761.40 : x
  2. Step 2: Convert to fraction form
    426,388.60/639,410.10 = 145,761.40/x
  3. Step 3: Cross multiply
    426,388.60x = 639,410.10 × 145,761.40
  4. Step 4: Simplify right side
    426,388.60x = 93,201,311,350.14
  5. Step 5: Solve for x
    x = 93,201,311,350.14/426,388.60
  6. Step 6: Final answer
    x = 218,583.03

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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.