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Finding the Fourth Proportional to 869.81, 1,201.03 and 672.98

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Solution

The fourth proportional to 869.81, 1,201.03 and 672.98 is: 929.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.81 : 1,201.03 = 672.98 : x
  2. Step 2: Convert to fraction form
    869.81/1,201.03 = 672.98/x
  3. Step 3: Cross multiply
    869.81x = 1,201.03 × 672.98
  4. Step 4: Simplify right side
    869.81x = 808,261.48
  5. Step 5: Solve for x
    x = 808,261.48/869.81
  6. Step 6: Final answer
    x = 929.24

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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.