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Finding the Fourth Proportional to 571.28, 851.70 and 556.84

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Solution

The fourth proportional to 571.28, 851.70 and 556.84 is: 830.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.28 : 851.70 = 556.84 : x
  2. Step 2: Convert to fraction form
    571.28/851.70 = 556.84/x
  3. Step 3: Cross multiply
    571.28x = 851.70 × 556.84
  4. Step 4: Simplify right side
    571.28x = 474,260.63
  5. Step 5: Solve for x
    x = 474,260.63/571.28
  6. Step 6: Final answer
    x = 830.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.