Home / 718,139.50-991,076.84-395,848.87

Finding the Fourth Proportional to 718,139.50, 991,076.84 and 395,848.87

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Solution

The fourth proportional to 718,139.50, 991,076.84 and 395,848.87 is: 546,295.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,139.50 : 991,076.84 = 395,848.87 : x
  2. Step 2: Convert to fraction form
    718,139.50/991,076.84 = 395,848.87/x
  3. Step 3: Cross multiply
    718,139.50x = 991,076.84 × 395,848.87
  4. Step 4: Simplify right side
    718,139.50x = 392,316,647,197.17
  5. Step 5: Solve for x
    x = 392,316,647,197.17/718,139.50
  6. Step 6: Final answer
    x = 546,295.88

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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.