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Finding the Fourth Proportional to 1,048.81, 1,572.34 and 818.71

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Solution

The fourth proportional to 1,048.81, 1,572.34 and 818.71 is: 1,227.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.81 : 1,572.34 = 818.71 : x
  2. Step 2: Convert to fraction form
    1,048.81/1,572.34 = 818.71/x
  3. Step 3: Cross multiply
    1,048.81x = 1,572.34 × 818.71
  4. Step 4: Simplify right side
    1,048.81x = 1,287,290.48
  5. Step 5: Solve for x
    x = 1,287,290.48/1,048.81
  6. Step 6: Final answer
    x = 1,227.38

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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.