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Finding the Fourth Proportional to 942.19, 1,410.97 and 648.87

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Solution

The fourth proportional to 942.19, 1,410.97 and 648.87 is: 971.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.19 : 1,410.97 = 648.87 : x
  2. Step 2: Convert to fraction form
    942.19/1,410.97 = 648.87/x
  3. Step 3: Cross multiply
    942.19x = 1,410.97 × 648.87
  4. Step 4: Simplify right side
    942.19x = 915,536.10
  5. Step 5: Solve for x
    x = 915,536.10/942.19
  6. Step 6: Final answer
    x = 971.71

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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.