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Finding the Fourth Proportional to 439.93, 607.16 and 253.43

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Solution

The fourth proportional to 439.93, 607.16 and 253.43 is: 349.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.93 : 607.16 = 253.43 : x
  2. Step 2: Convert to fraction form
    439.93/607.16 = 253.43/x
  3. Step 3: Cross multiply
    439.93x = 607.16 × 253.43
  4. Step 4: Simplify right side
    439.93x = 153,872.43
  5. Step 5: Solve for x
    x = 153,872.43/439.93
  6. Step 6: Final answer
    x = 349.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.