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Finding the Fourth Proportional to 988.04, 1,478.28 and 577.37

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Solution

The fourth proportional to 988.04, 1,478.28 and 577.37 is: 863.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.04 : 1,478.28 = 577.37 : x
  2. Step 2: Convert to fraction form
    988.04/1,478.28 = 577.37/x
  3. Step 3: Cross multiply
    988.04x = 1,478.28 × 577.37
  4. Step 4: Simplify right side
    988.04x = 853,514.52
  5. Step 5: Solve for x
    x = 853,514.52/988.04
  6. Step 6: Final answer
    x = 863.85

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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.