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Finding the Fourth Proportional to 898.56, 1,348.08 and 812.88

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Solution

The fourth proportional to 898.56, 1,348.08 and 812.88 is: 1,219.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.56 : 1,348.08 = 812.88 : x
  2. Step 2: Convert to fraction form
    898.56/1,348.08 = 812.88/x
  3. Step 3: Cross multiply
    898.56x = 1,348.08 × 812.88
  4. Step 4: Simplify right side
    898.56x = 1,095,827.27
  5. Step 5: Solve for x
    x = 1,095,827.27/898.56
  6. Step 6: Final answer
    x = 1,219.54

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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.