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Finding the Fourth Proportional to 618.42, 926.88 and 253.02

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Solution

The fourth proportional to 618.42, 926.88 and 253.02 is: 379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.42 : 926.88 = 253.02 : x
  2. Step 2: Convert to fraction form
    618.42/926.88 = 253.02/x
  3. Step 3: Cross multiply
    618.42x = 926.88 × 253.02
  4. Step 4: Simplify right side
    618.42x = 234,519.18
  5. Step 5: Solve for x
    x = 234,519.18/618.42
  6. Step 6: Final answer
    x = 379.22

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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.