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Finding the Fourth Proportional to 370.67, 511.53 and 215.42

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Solution

The fourth proportional to 370.67, 511.53 and 215.42 is: 297.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.67 : 511.53 = 215.42 : x
  2. Step 2: Convert to fraction form
    370.67/511.53 = 215.42/x
  3. Step 3: Cross multiply
    370.67x = 511.53 × 215.42
  4. Step 4: Simplify right side
    370.67x = 110,193.79
  5. Step 5: Solve for x
    x = 110,193.79/370.67
  6. Step 6: Final answer
    x = 297.28

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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.