Home / 426,290.31-639,297.05-141,904.49

Finding the Fourth Proportional to 426,290.31, 639,297.05 and 141,904.49

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Solution

The fourth proportional to 426,290.31, 639,297.05 and 141,904.49 is: 212,810.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,290.31 : 639,297.05 = 141,904.49 : x
  2. Step 2: Convert to fraction form
    426,290.31/639,297.05 = 141,904.49/x
  3. Step 3: Cross multiply
    426,290.31x = 639,297.05 × 141,904.49
  4. Step 4: Simplify right side
    426,290.31x = 90,719,117,932.75
  5. Step 5: Solve for x
    x = 90,719,117,932.75/426,290.31
  6. Step 6: Final answer
    x = 212,810.65

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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.