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Finding the Fourth Proportional to 903.34, 1,352.76 and 661.42

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Solution

The fourth proportional to 903.34, 1,352.76 and 661.42 is: 990.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.34 : 1,352.76 = 661.42 : x
  2. Step 2: Convert to fraction form
    903.34/1,352.76 = 661.42/x
  3. Step 3: Cross multiply
    903.34x = 1,352.76 × 661.42
  4. Step 4: Simplify right side
    903.34x = 894,742.52
  5. Step 5: Solve for x
    x = 894,742.52/903.34
  6. Step 6: Final answer
    x = 990.48

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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.