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Finding the Fourth Proportional to 975.17, 1,343.79 and 694.91

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Solution

The fourth proportional to 975.17, 1,343.79 and 694.91 is: 957.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.17 : 1,343.79 = 694.91 : x
  2. Step 2: Convert to fraction form
    975.17/1,343.79 = 694.91/x
  3. Step 3: Cross multiply
    975.17x = 1,343.79 × 694.91
  4. Step 4: Simplify right side
    975.17x = 933,816.47
  5. Step 5: Solve for x
    x = 933,816.47/975.17
  6. Step 6: Final answer
    x = 957.59

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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.