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Finding the Fourth Proportional to 571.48, 858.13 and 478.85

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Solution

The fourth proportional to 571.48, 858.13 and 478.85 is: 719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.48 : 858.13 = 478.85 : x
  2. Step 2: Convert to fraction form
    571.48/858.13 = 478.85/x
  3. Step 3: Cross multiply
    571.48x = 858.13 × 478.85
  4. Step 4: Simplify right side
    571.48x = 410,910.06
  5. Step 5: Solve for x
    x = 410,910.06/571.48
  6. Step 6: Final answer
    x = 719.03

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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.