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Finding the Fourth Proportional to 570.40, 855.68 and 180.51

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Solution

The fourth proportional to 570.40, 855.68 and 180.51 is: 270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.40 : 855.68 = 180.51 : x
  2. Step 2: Convert to fraction form
    570.40/855.68 = 180.51/x
  3. Step 3: Cross multiply
    570.40x = 855.68 × 180.51
  4. Step 4: Simplify right side
    570.40x = 154,457.92
  5. Step 5: Solve for x
    x = 154,457.92/570.40
  6. Step 6: Final answer
    x = 270.79

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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.