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Finding the Fourth Proportional to 955.86, 1,318.71 and 707.77

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Solution

The fourth proportional to 955.86, 1,318.71 and 707.77 is: 976.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.86 : 1,318.71 = 707.77 : x
  2. Step 2: Convert to fraction form
    955.86/1,318.71 = 707.77/x
  3. Step 3: Cross multiply
    955.86x = 1,318.71 × 707.77
  4. Step 4: Simplify right side
    955.86x = 933,343.38
  5. Step 5: Solve for x
    x = 933,343.38/955.86
  6. Step 6: Final answer
    x = 976.44

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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.