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Finding the Fourth Proportional to 571.10, 856.64 and 186.35

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Solution

The fourth proportional to 571.10, 856.64 and 186.35 is: 279.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.10 : 856.64 = 186.35 : x
  2. Step 2: Convert to fraction form
    571.10/856.64 = 186.35/x
  3. Step 3: Cross multiply
    571.10x = 856.64 × 186.35
  4. Step 4: Simplify right side
    571.10x = 159,635.87
  5. Step 5: Solve for x
    x = 159,635.87/571.10
  6. Step 6: Final answer
    x = 279.52

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Double scale
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Similar ratio
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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.