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Finding the Fourth Proportional to 723,346.72, 998,206.80 and 396,658.72

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Solution

The fourth proportional to 723,346.72, 998,206.80 and 396,658.72 is: 547,382.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,346.72 : 998,206.80 = 396,658.72 : x
  2. Step 2: Convert to fraction form
    723,346.72/998,206.80 = 396,658.72/x
  3. Step 3: Cross multiply
    723,346.72x = 998,206.80 × 396,658.72
  4. Step 4: Simplify right side
    723,346.72x = 395,947,431,583.30
  5. Step 5: Solve for x
    x = 395,947,431,583.30/723,346.72
  6. Step 6: Final answer
    x = 547,382.63

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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.