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Finding the Fourth Proportional to 547.78, 756.06 and 315.04

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Solution

The fourth proportional to 547.78, 756.06 and 315.04 is: 434.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.78 : 756.06 = 315.04 : x
  2. Step 2: Convert to fraction form
    547.78/756.06 = 315.04/x
  3. Step 3: Cross multiply
    547.78x = 756.06 × 315.04
  4. Step 4: Simplify right side
    547.78x = 238,189.14
  5. Step 5: Solve for x
    x = 238,189.14/547.78
  6. Step 6: Final answer
    x = 434.83

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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.