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Finding the Fourth Proportional to 608.42, 913.29 and 261.93

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Solution

The fourth proportional to 608.42, 913.29 and 261.93 is: 393.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.42 : 913.29 = 261.93 : x
  2. Step 2: Convert to fraction form
    608.42/913.29 = 261.93/x
  3. Step 3: Cross multiply
    608.42x = 913.29 × 261.93
  4. Step 4: Simplify right side
    608.42x = 239,216.74
  5. Step 5: Solve for x
    x = 239,216.74/608.42
  6. Step 6: Final answer
    x = 393.18

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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.