Home / 718,408.04-991,384.11-396,112.68

Finding the Fourth Proportional to 718,408.04, 991,384.11 and 396,112.68

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Solution

The fourth proportional to 718,408.04, 991,384.11 and 396,112.68 is: 546,625.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,408.04 : 991,384.11 = 396,112.68 : x
  2. Step 2: Convert to fraction form
    718,408.04/991,384.11 = 396,112.68/x
  3. Step 3: Cross multiply
    718,408.04x = 991,384.11 × 396,112.68
  4. Step 4: Simplify right side
    718,408.04x = 392,699,816,721.52
  5. Step 5: Solve for x
    x = 392,699,816,721.52/718,408.04
  6. Step 6: Final answer
    x = 546,625.03

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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.