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Finding the Fourth Proportional to 370.86, 511.86 and 215.64

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Solution

The fourth proportional to 370.86, 511.86 and 215.64 is: 297.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.86 : 511.86 = 215.64 : x
  2. Step 2: Convert to fraction form
    370.86/511.86 = 215.64/x
  3. Step 3: Cross multiply
    370.86x = 511.86 × 215.64
  4. Step 4: Simplify right side
    370.86x = 110,377.49
  5. Step 5: Solve for x
    x = 110,377.49/370.86
  6. Step 6: Final answer
    x = 297.63

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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.