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Finding the Fourth Proportional to 571.50, 858.76 and 311.69

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Solution

The fourth proportional to 571.50, 858.76 and 311.69 is: 468.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.50 : 858.76 = 311.69 : x
  2. Step 2: Convert to fraction form
    571.50/858.76 = 311.69/x
  3. Step 3: Cross multiply
    571.50x = 858.76 × 311.69
  4. Step 4: Simplify right side
    571.50x = 267,662.61
  5. Step 5: Solve for x
    x = 267,662.61/571.50
  6. Step 6: Final answer
    x = 468.36

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1.5x scale

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.