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Finding the Fourth Proportional to 587.93, 810.81 and 391.50

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Solution

The fourth proportional to 587.93, 810.81 and 391.50 is: 539.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.93 : 810.81 = 391.50 : x
  2. Step 2: Convert to fraction form
    587.93/810.81 = 391.50/x
  3. Step 3: Cross multiply
    587.93x = 810.81 × 391.50
  4. Step 4: Simplify right side
    587.93x = 317,432.12
  5. Step 5: Solve for x
    x = 317,432.12/587.93
  6. Step 6: Final answer
    x = 539.92

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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.