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Finding the Fourth Proportional to 210.91, 291.02 and 117.65

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Solution

The fourth proportional to 210.91, 291.02 and 117.65 is: 162.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.91 : 291.02 = 117.65 : x
  2. Step 2: Convert to fraction form
    210.91/291.02 = 117.65/x
  3. Step 3: Cross multiply
    210.91x = 291.02 × 117.65
  4. Step 4: Simplify right side
    210.91x = 34,237.34
  5. Step 5: Solve for x
    x = 34,237.34/210.91
  6. Step 6: Final answer
    x = 162.33

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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.