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Finding the Fourth Proportional to 995, 1,488.84 and 628.10

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Solution

The fourth proportional to 995, 1,488.84 and 628.10 is: 939.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    995 : 1,488.84 = 628.10 : x
  2. Step 2: Convert to fraction form
    995/1,488.84 = 628.10/x
  3. Step 3: Cross multiply
    995x = 1,488.84 × 628.10
  4. Step 4: Simplify right side
    995x = 935,140.40
  5. Step 5: Solve for x
    x = 935,140.40/995
  6. Step 6: Final answer
    x = 939.84

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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.