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Finding the Fourth Proportional to 697.06, 1,040.48 and 646.30

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Solution

The fourth proportional to 697.06, 1,040.48 and 646.30 is: 964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.06 : 1,040.48 = 646.30 : x
  2. Step 2: Convert to fraction form
    697.06/1,040.48 = 646.30/x
  3. Step 3: Cross multiply
    697.06x = 1,040.48 × 646.30
  4. Step 4: Simplify right side
    697.06x = 672,462.22
  5. Step 5: Solve for x
    x = 672,462.22/697.06
  6. Step 6: Final answer
    x = 964.71

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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.