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Finding the Fourth Proportional to 696.39, 1,038.49 and 610.12

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Solution

The fourth proportional to 696.39, 1,038.49 and 610.12 is: 909.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.39 : 1,038.49 = 610.12 : x
  2. Step 2: Convert to fraction form
    696.39/1,038.49 = 610.12/x
  3. Step 3: Cross multiply
    696.39x = 1,038.49 × 610.12
  4. Step 4: Simplify right side
    696.39x = 633,603.52
  5. Step 5: Solve for x
    x = 633,603.52/696.39
  6. Step 6: Final answer
    x = 909.84

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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.