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Finding the Fourth Proportional to 775.38, 1,162.34 and 385.14

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Solution

The fourth proportional to 775.38, 1,162.34 and 385.14 is: 577.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.38 : 1,162.34 = 385.14 : x
  2. Step 2: Convert to fraction form
    775.38/1,162.34 = 385.14/x
  3. Step 3: Cross multiply
    775.38x = 1,162.34 × 385.14
  4. Step 4: Simplify right side
    775.38x = 447,663.63
  5. Step 5: Solve for x
    x = 447,663.63/775.38
  6. Step 6: Final answer
    x = 577.35

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Double scale
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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.