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Finding the Fourth Proportional to 956.95, 1,319.29 and 818.55

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Solution

The fourth proportional to 956.95, 1,319.29 and 818.55 is: 1,128.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.95 : 1,319.29 = 818.55 : x
  2. Step 2: Convert to fraction form
    956.95/1,319.29 = 818.55/x
  3. Step 3: Cross multiply
    956.95x = 1,319.29 × 818.55
  4. Step 4: Simplify right side
    956.95x = 1,079,904.83
  5. Step 5: Solve for x
    x = 1,079,904.83/956.95
  6. Step 6: Final answer
    x = 1,128.49

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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.