Home / 718,708.96-991,823.04-396,427.76

Finding the Fourth Proportional to 718,708.96, 991,823.04 and 396,427.76

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Solution

The fourth proportional to 718,708.96, 991,823.04 and 396,427.76 is: 547,072.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,708.96 : 991,823.04 = 396,427.76 : x
  2. Step 2: Convert to fraction form
    718,708.96/991,823.04 = 396,427.76/x
  3. Step 3: Cross multiply
    718,708.96x = 991,823.04 × 396,427.76
  4. Step 4: Simplify right side
    718,708.96x = 393,186,186,063.59
  5. Step 5: Solve for x
    x = 393,186,186,063.59/718,708.96
  6. Step 6: Final answer
    x = 547,072.89

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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.