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Finding the Fourth Proportional to 697.10, 1,040.00 and 671.88

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Solution

The fourth proportional to 697.10, 1,040.00 and 671.88 is: 1,002.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.10 : 1,040.00 = 671.88 : x
  2. Step 2: Convert to fraction form
    697.10/1,040.00 = 671.88/x
  3. Step 3: Cross multiply
    697.10x = 1,040.00 × 671.88
  4. Step 4: Simplify right side
    697.10x = 698,756.88
  5. Step 5: Solve for x
    x = 698,756.88/697.10
  6. Step 6: Final answer
    x = 1,002.38

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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.