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Finding the Fourth Proportional to 991.88, 1,488.18 and 602.68

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Solution

The fourth proportional to 991.88, 1,488.18 and 602.68 is: 904.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    991.88 : 1,488.18 = 602.68 : x
  2. Step 2: Convert to fraction form
    991.88/1,488.18 = 602.68/x
  3. Step 3: Cross multiply
    991.88x = 1,488.18 × 602.68
  4. Step 4: Simplify right side
    991.88x = 896,891.10
  5. Step 5: Solve for x
    x = 896,891.10/991.88
  6. Step 6: Final answer
    x = 904.23

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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.