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Finding the Fourth Proportional to 723,789.80, 998,810.62 and 417,855.88

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Solution

The fourth proportional to 723,789.80, 998,810.62 and 417,855.88 is: 576,629.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,789.80 : 998,810.62 = 417,855.88 : x
  2. Step 2: Convert to fraction form
    723,789.80/998,810.62 = 417,855.88/x
  3. Step 3: Cross multiply
    723,789.80x = 998,810.62 × 417,855.88
  4. Step 4: Simplify right side
    723,789.80x = 417,358,890,573.45
  5. Step 5: Solve for x
    x = 417,358,890,573.45/723,789.80
  6. Step 6: Final answer
    x = 576,629.97

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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.