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Finding the Fourth Proportional to 883.18, 1,218.88 and 551.84

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Solution

The fourth proportional to 883.18, 1,218.88 and 551.84 is: 761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.18 : 1,218.88 = 551.84 : x
  2. Step 2: Convert to fraction form
    883.18/1,218.88 = 551.84/x
  3. Step 3: Cross multiply
    883.18x = 1,218.88 × 551.84
  4. Step 4: Simplify right side
    883.18x = 672,626.74
  5. Step 5: Solve for x
    x = 672,626.74/883.18
  6. Step 6: Final answer
    x = 761.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.