Home / 642,918.88-887,249.52-356,421.88

Finding the Fourth Proportional to 642,918.88, 887,249.52 and 356,421.88

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Solution

The fourth proportional to 642,918.88, 887,249.52 and 356,421.88 is: 491,874.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,918.88 : 887,249.52 = 356,421.88 : x
  2. Step 2: Convert to fraction form
    642,918.88/887,249.52 = 356,421.88/x
  3. Step 3: Cross multiply
    642,918.88x = 887,249.52 × 356,421.88
  4. Step 4: Simplify right side
    642,918.88x = 316,235,141,947.50
  5. Step 5: Solve for x
    x = 316,235,141,947.50/642,918.88
  6. Step 6: Final answer
    x = 491,874.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.