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Finding the Fourth Proportional to 587.54, 811.23 and 391.46

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Solution

The fourth proportional to 587.54, 811.23 and 391.46 is: 540.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.54 : 811.23 = 391.46 : x
  2. Step 2: Convert to fraction form
    587.54/811.23 = 391.46/x
  3. Step 3: Cross multiply
    587.54x = 811.23 × 391.46
  4. Step 4: Simplify right side
    587.54x = 317,564.10
  5. Step 5: Solve for x
    x = 317,564.10/587.54
  6. Step 6: Final answer
    x = 540.50

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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.