Home / 642,819.87-887,031.81-356,315.58

Finding the Fourth Proportional to 642,819.87, 887,031.81 and 356,315.58

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Solution

The fourth proportional to 642,819.87, 887,031.81 and 356,315.58 is: 491,682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,819.87 : 887,031.81 = 356,315.58 : x
  2. Step 2: Convert to fraction form
    642,819.87/887,031.81 = 356,315.58/x
  3. Step 3: Cross multiply
    642,819.87x = 887,031.81 × 356,315.58
  4. Step 4: Simplify right side
    642,819.87x = 316,063,253,858.60
  5. Step 5: Solve for x
    x = 316,063,253,858.60/642,819.87
  6. Step 6: Final answer
    x = 491,682.46

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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.