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Finding the Fourth Proportional to 210.24, 290.15 and 127.34

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Solution

The fourth proportional to 210.24, 290.15 and 127.34 is: 175.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.24 : 290.15 = 127.34 : x
  2. Step 2: Convert to fraction form
    210.24/290.15 = 127.34/x
  3. Step 3: Cross multiply
    210.24x = 290.15 × 127.34
  4. Step 4: Simplify right side
    210.24x = 36,948.91
  5. Step 5: Solve for x
    x = 36,948.91/210.24
  6. Step 6: Final answer
    x = 175.75

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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.