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Finding the Fourth Proportional to 571.71, 856.53 and 398.01

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Solution

The fourth proportional to 571.71, 856.53 and 398.01 is: 596.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.71 : 856.53 = 398.01 : x
  2. Step 2: Convert to fraction form
    571.71/856.53 = 398.01/x
  3. Step 3: Cross multiply
    571.71x = 856.53 × 398.01
  4. Step 4: Simplify right side
    571.71x = 340,907.51
  5. Step 5: Solve for x
    x = 340,907.51/571.71
  6. Step 6: Final answer
    x = 596.29

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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.