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Finding the Fourth Proportional to 587.83, 811.09 and 477.11

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Solution

The fourth proportional to 587.83, 811.09 and 477.11 is: 658.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.83 : 811.09 = 477.11 : x
  2. Step 2: Convert to fraction form
    587.83/811.09 = 477.11/x
  3. Step 3: Cross multiply
    587.83x = 811.09 × 477.11
  4. Step 4: Simplify right side
    587.83x = 386,979.15
  5. Step 5: Solve for x
    x = 386,979.15/587.83
  6. Step 6: Final answer
    x = 658.32

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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.