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Finding the Fourth Proportional to 898.80, 1,348.88 and 412.19

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Solution

The fourth proportional to 898.80, 1,348.88 and 412.19 is: 618.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.80 : 1,348.88 = 412.19 : x
  2. Step 2: Convert to fraction form
    898.80/1,348.88 = 412.19/x
  3. Step 3: Cross multiply
    898.80x = 1,348.88 × 412.19
  4. Step 4: Simplify right side
    898.80x = 555,992.79
  5. Step 5: Solve for x
    x = 555,992.79/898.80
  6. Step 6: Final answer
    x = 618.59

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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.