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Finding the Fourth Proportional to 548.10, 756.41 and 312.08

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Solution

The fourth proportional to 548.10, 756.41 and 312.08 is: 430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.10 : 756.41 = 312.08 : x
  2. Step 2: Convert to fraction form
    548.10/756.41 = 312.08/x
  3. Step 3: Cross multiply
    548.10x = 756.41 × 312.08
  4. Step 4: Simplify right side
    548.10x = 236,055.68
  5. Step 5: Solve for x
    x = 236,055.68/548.10
  6. Step 6: Final answer
    x = 430.68

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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.