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Finding the Fourth Proportional to 370.70, 511.66 and 287.58

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Solution

The fourth proportional to 370.70, 511.66 and 287.58 is: 396.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.70 : 511.66 = 287.58 : x
  2. Step 2: Convert to fraction form
    370.70/511.66 = 287.58/x
  3. Step 3: Cross multiply
    370.70x = 511.66 × 287.58
  4. Step 4: Simplify right side
    370.70x = 147,143.18
  5. Step 5: Solve for x
    x = 147,143.18/370.70
  6. Step 6: Final answer
    x = 396.93

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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.