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Finding the Fourth Proportional to 955.86, 1,318.24 and 690.23

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Solution

The fourth proportional to 955.86, 1,318.24 and 690.23 is: 951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.86 : 1,318.24 = 690.23 : x
  2. Step 2: Convert to fraction form
    955.86/1,318.24 = 690.23/x
  3. Step 3: Cross multiply
    955.86x = 1,318.24 × 690.23
  4. Step 4: Simplify right side
    955.86x = 909,885.50
  5. Step 5: Solve for x
    x = 909,885.50/955.86
  6. Step 6: Final answer
    x = 951.91

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Half scale
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Double scale
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1.5x scale

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.