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Finding the Fourth Proportional to 956.36, 1,319.40 and 708.27

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Solution

The fourth proportional to 956.36, 1,319.40 and 708.27 is: 977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.36 : 1,319.40 = 708.27 : x
  2. Step 2: Convert to fraction form
    956.36/1,319.40 = 708.27/x
  3. Step 3: Cross multiply
    956.36x = 1,319.40 × 708.27
  4. Step 4: Simplify right side
    956.36x = 934,491.44
  5. Step 5: Solve for x
    x = 934,491.44/956.36
  6. Step 6: Final answer
    x = 977.13

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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.