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Finding the Fourth Proportional to 547.89, 756.25 and 351.40

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Solution

The fourth proportional to 547.89, 756.25 and 351.40 is: 485.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.89 : 756.25 = 351.40 : x
  2. Step 2: Convert to fraction form
    547.89/756.25 = 351.40/x
  3. Step 3: Cross multiply
    547.89x = 756.25 × 351.40
  4. Step 4: Simplify right side
    547.89x = 265,746.25
  5. Step 5: Solve for x
    x = 265,746.25/547.89
  6. Step 6: Final answer
    x = 485.04

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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.