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Finding the Fourth Proportional to 210.63, 290.55 and 127.71

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Solution

The fourth proportional to 210.63, 290.55 and 127.71 is: 176.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.63 : 290.55 = 127.71 : x
  2. Step 2: Convert to fraction form
    210.63/290.55 = 127.71/x
  3. Step 3: Cross multiply
    210.63x = 290.55 × 127.71
  4. Step 4: Simplify right side
    210.63x = 37,106.14
  5. Step 5: Solve for x
    x = 37,106.14/210.63
  6. Step 6: Final answer
    x = 176.17

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.