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Finding the Fourth Proportional to 540.66, 810.70 and 211.71

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Solution

The fourth proportional to 540.66, 810.70 and 211.71 is: 317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.66 : 810.70 = 211.71 : x
  2. Step 2: Convert to fraction form
    540.66/810.70 = 211.71/x
  3. Step 3: Cross multiply
    540.66x = 810.70 × 211.71
  4. Step 4: Simplify right side
    540.66x = 171,632.77
  5. Step 5: Solve for x
    x = 171,632.77/540.66
  6. Step 6: Final answer
    x = 317.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.