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Finding the Fourth Proportional to 571.04, 856.40 and 408.24

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Solution

The fourth proportional to 571.04, 856.40 and 408.24 is: 612.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.04 : 856.40 = 408.24 : x
  2. Step 2: Convert to fraction form
    571.04/856.40 = 408.24/x
  3. Step 3: Cross multiply
    571.04x = 856.40 × 408.24
  4. Step 4: Simplify right side
    571.04x = 349,616.74
  5. Step 5: Solve for x
    x = 349,616.74/571.04
  6. Step 6: Final answer
    x = 612.25

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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.