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Finding the Fourth Proportional to 547.92, 756.16 and 315.08

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Solution

The fourth proportional to 547.92, 756.16 and 315.08 is: 434.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.92 : 756.16 = 315.08 : x
  2. Step 2: Convert to fraction form
    547.92/756.16 = 315.08/x
  3. Step 3: Cross multiply
    547.92x = 756.16 × 315.08
  4. Step 4: Simplify right side
    547.92x = 238,250.89
  5. Step 5: Solve for x
    x = 238,250.89/547.92
  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.