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Finding the Fourth Proportional to 370.60, 511.72 and 287.56

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Solution

The fourth proportional to 370.60, 511.72 and 287.56 is: 397.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.60 : 511.72 = 287.56 : x
  2. Step 2: Convert to fraction form
    370.60/511.72 = 287.56/x
  3. Step 3: Cross multiply
    370.60x = 511.72 × 287.56
  4. Step 4: Simplify right side
    370.60x = 147,150.20
  5. Step 5: Solve for x
    x = 147,150.20/370.60
  6. Step 6: Final answer
    x = 397.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.