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Finding the Fourth Proportional to 1,020.57, 1,530.86 and 251.07

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Solution

The fourth proportional to 1,020.57, 1,530.86 and 251.07 is: 376.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.57 : 1,530.86 = 251.07 : x
  2. Step 2: Convert to fraction form
    1,020.57/1,530.86 = 251.07/x
  3. Step 3: Cross multiply
    1,020.57x = 1,530.86 × 251.07
  4. Step 4: Simplify right side
    1,020.57x = 384,351.76
  5. Step 5: Solve for x
    x = 384,351.76/1,020.57
  6. Step 6: Final answer
    x = 376.61

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Double scale
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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.