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Finding the Fourth Proportional to 766.18, 1,056.88 and 556.11

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Solution

The fourth proportional to 766.18, 1,056.88 and 556.11 is: 767.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.18 : 1,056.88 = 556.11 : x
  2. Step 2: Convert to fraction form
    766.18/1,056.88 = 556.11/x
  3. Step 3: Cross multiply
    766.18x = 1,056.88 × 556.11
  4. Step 4: Simplify right side
    766.18x = 587,741.54
  5. Step 5: Solve for x
    x = 587,741.54/766.18
  6. Step 6: Final answer
    x = 767.11

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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.