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Finding the Fourth Proportional to 373.55, 515.99 and 287.29

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Solution

The fourth proportional to 373.55, 515.99 and 287.29 is: 396.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.55 : 515.99 = 287.29 : x
  2. Step 2: Convert to fraction form
    373.55/515.99 = 287.29/x
  3. Step 3: Cross multiply
    373.55x = 515.99 × 287.29
  4. Step 4: Simplify right side
    373.55x = 148,238.77
  5. Step 5: Solve for x
    x = 148,238.77/373.55
  6. Step 6: Final answer
    x = 396.84

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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.