Home / 426,264,761.20-639,397,141.80-262,687,221.40

Finding the Fourth Proportional to 426,264,761.20, 639,397,141.80 and 262,687,221.40

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Solution

The fourth proportional to 426,264,761.20, 639,397,141.80 and 262,687,221.40 is: 394,030,832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,264,761.20 : 639,397,141.80 = 262,687,221.40 : x
  2. Step 2: Convert to fraction form
    426,264,761.20/639,397,141.80 = 262,687,221.40/x
  3. Step 3: Cross multiply
    426,264,761.20x = 639,397,141.80 × 262,687,221.40
  4. Step 4: Simplify right side
    426,264,761.20x = 167,961,458,550,543,776
  5. Step 5: Solve for x
    x = 167,961,458,550,543,776/426,264,761.20
  6. Step 6: Final answer
    x = 394,030,832.10

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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.