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Finding the Fourth Proportional to 1,108.04, 1,658.10 and 697.40

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Solution

The fourth proportional to 1,108.04, 1,658.10 and 697.40 is: 1,043.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.04 : 1,658.10 = 697.40 : x
  2. Step 2: Convert to fraction form
    1,108.04/1,658.10 = 697.40/x
  3. Step 3: Cross multiply
    1,108.04x = 1,658.10 × 697.40
  4. Step 4: Simplify right side
    1,108.04x = 1,156,358.94
  5. Step 5: Solve for x
    x = 1,156,358.94/1,108.04
  6. Step 6: Final answer
    x = 1,043.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.