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Finding the Fourth Proportional to 1,399.59, 2,098.80 and 577.65

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Solution

The fourth proportional to 1,399.59, 2,098.80 and 577.65 is: 866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.59 : 2,098.80 = 577.65 : x
  2. Step 2: Convert to fraction form
    1,399.59/2,098.80 = 577.65/x
  3. Step 3: Cross multiply
    1,399.59x = 2,098.80 × 577.65
  4. Step 4: Simplify right side
    1,399.59x = 1,212,371.82
  5. Step 5: Solve for x
    x = 1,212,371.82/1,399.59
  6. Step 6: Final answer
    x = 866.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.