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Finding the Fourth Proportional to 889.52, 1,227.53 and 491.19

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Solution

The fourth proportional to 889.52, 1,227.53 and 491.19 is: 677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.52 : 1,227.53 = 491.19 : x
  2. Step 2: Convert to fraction form
    889.52/1,227.53 = 491.19/x
  3. Step 3: Cross multiply
    889.52x = 1,227.53 × 491.19
  4. Step 4: Simplify right side
    889.52x = 602,941.87
  5. Step 5: Solve for x
    x = 602,941.87/889.52
  6. Step 6: Final answer
    x = 677.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.