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Finding the Fourth Proportional to 618.47, 927.91 and 253.06

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Solution

The fourth proportional to 618.47, 927.91 and 253.06 is: 379.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.47 : 927.91 = 253.06 : x
  2. Step 2: Convert to fraction form
    618.47/927.91 = 253.06/x
  3. Step 3: Cross multiply
    618.47x = 927.91 × 253.06
  4. Step 4: Simplify right side
    618.47x = 234,813.48
  5. Step 5: Solve for x
    x = 234,813.48/618.47
  6. Step 6: Final answer
    x = 379.67

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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.