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Finding the Fourth Proportional to 988.69, 1,364.36 and 590.52

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Solution

The fourth proportional to 988.69, 1,364.36 and 590.52 is: 814.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.69 : 1,364.36 = 590.52 : x
  2. Step 2: Convert to fraction form
    988.69/1,364.36 = 590.52/x
  3. Step 3: Cross multiply
    988.69x = 1,364.36 × 590.52
  4. Step 4: Simplify right side
    988.69x = 805,687.35
  5. Step 5: Solve for x
    x = 805,687.35/988.69
  6. Step 6: Final answer
    x = 814.90

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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.