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Finding the Fourth Proportional to 578.70, 866.70 and 565.20

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Solution

The fourth proportional to 578.70, 866.70 and 565.20 is: 846.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.70 : 866.70 = 565.20 : x
  2. Step 2: Convert to fraction form
    578.70/866.70 = 565.20/x
  3. Step 3: Cross multiply
    578.70x = 866.70 × 565.20
  4. Step 4: Simplify right side
    578.70x = 489,858.84
  5. Step 5: Solve for x
    x = 489,858.84/578.70
  6. Step 6: Final answer
    x = 846.48

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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.