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Finding the Fourth Proportional to 584.28, 874.80 and 391.50

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Solution

The fourth proportional to 584.28, 874.80 and 391.50 is: 586.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.28 : 874.80 = 391.50 : x
  2. Step 2: Convert to fraction form
    584.28/874.80 = 391.50/x
  3. Step 3: Cross multiply
    584.28x = 874.80 × 391.50
  4. Step 4: Simplify right side
    584.28x = 342,484.20
  5. Step 5: Solve for x
    x = 342,484.20/584.28
  6. Step 6: Final answer
    x = 586.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.