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Finding the Fourth Proportional to 694.40, 1,036.80 and 564.48

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Solution

The fourth proportional to 694.40, 1,036.80 and 564.48 is: 842.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.40 : 1,036.80 = 564.48 : x
  2. Step 2: Convert to fraction form
    694.40/1,036.80 = 564.48/x
  3. Step 3: Cross multiply
    694.40x = 1,036.80 × 564.48
  4. Step 4: Simplify right side
    694.40x = 585,252.86
  5. Step 5: Solve for x
    x = 585,252.86/694.40
  6. Step 6: Final answer
    x = 842.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.