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Finding the Fourth Proportional to 939.66, 1,296.60 and 566.74

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Solution

The fourth proportional to 939.66, 1,296.60 and 566.74 is: 782.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.66 : 1,296.60 = 566.74 : x
  2. Step 2: Convert to fraction form
    939.66/1,296.60 = 566.74/x
  3. Step 3: Cross multiply
    939.66x = 1,296.60 × 566.74
  4. Step 4: Simplify right side
    939.66x = 734,835.08
  5. Step 5: Solve for x
    x = 734,835.08/939.66
  6. Step 6: Final answer
    x = 782.02

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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.