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Finding the Fourth Proportional to 988.68, 1,364.24 and 590.22

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Solution

The fourth proportional to 988.68, 1,364.24 and 590.22 is: 814.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.68 : 1,364.24 = 590.22 : x
  2. Step 2: Convert to fraction form
    988.68/1,364.24 = 590.22/x
  3. Step 3: Cross multiply
    988.68x = 1,364.24 × 590.22
  4. Step 4: Simplify right side
    988.68x = 805,201.73
  5. Step 5: Solve for x
    x = 805,201.73/988.68
  6. Step 6: Final answer
    x = 814.42

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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.