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Finding the Fourth Proportional to 1,203.16, 1,660.34 and 672.05

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Solution

The fourth proportional to 1,203.16, 1,660.34 and 672.05 is: 927.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.16 : 1,660.34 = 672.05 : x
  2. Step 2: Convert to fraction form
    1,203.16/1,660.34 = 672.05/x
  3. Step 3: Cross multiply
    1,203.16x = 1,660.34 × 672.05
  4. Step 4: Simplify right side
    1,203.16x = 1,115,831.40
  5. Step 5: Solve for x
    x = 1,115,831.40/1,203.16
  6. Step 6: Final answer
    x = 927.42

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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.