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Finding the Fourth Proportional to 697.15, 1,045.86 and 551.35

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Solution

The fourth proportional to 697.15, 1,045.86 and 551.35 is: 827.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.15 : 1,045.86 = 551.35 : x
  2. Step 2: Convert to fraction form
    697.15/1,045.86 = 551.35/x
  3. Step 3: Cross multiply
    697.15x = 1,045.86 × 551.35
  4. Step 4: Simplify right side
    697.15x = 576,634.91
  5. Step 5: Solve for x
    x = 576,634.91/697.15
  6. Step 6: Final answer
    x = 827.13

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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.