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Finding the Fourth Proportional to 500.15, 750.13 and 211.79

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Solution

The fourth proportional to 500.15, 750.13 and 211.79 is: 317.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.15 : 750.13 = 211.79 : x
  2. Step 2: Convert to fraction form
    500.15/750.13 = 211.79/x
  3. Step 3: Cross multiply
    500.15x = 750.13 × 211.79
  4. Step 4: Simplify right side
    500.15x = 158,870.03
  5. Step 5: Solve for x
    x = 158,870.03/500.15
  6. Step 6: Final answer
    x = 317.64

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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.