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Finding the Fourth Proportional to 373.63, 515.29 and 280.60

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Solution

The fourth proportional to 373.63, 515.29 and 280.60 is: 386.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.63 : 515.29 = 280.60 : x
  2. Step 2: Convert to fraction form
    373.63/515.29 = 280.60/x
  3. Step 3: Cross multiply
    373.63x = 515.29 × 280.60
  4. Step 4: Simplify right side
    373.63x = 144,590.37
  5. Step 5: Solve for x
    x = 144,590.37/373.63
  6. Step 6: Final answer
    x = 386.99

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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.