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Finding the Fourth Proportional to 956.35, 1,319.02 and 641.51

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Solution

The fourth proportional to 956.35, 1,319.02 and 641.51 is: 884.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.35 : 1,319.02 = 641.51 : x
  2. Step 2: Convert to fraction form
    956.35/1,319.02 = 641.51/x
  3. Step 3: Cross multiply
    956.35x = 1,319.02 × 641.51
  4. Step 4: Simplify right side
    956.35x = 846,164.52
  5. Step 5: Solve for x
    x = 846,164.52/956.35
  6. Step 6: Final answer
    x = 884.79

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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.