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Finding the Fourth Proportional to 307.51, 461.03 and 209.76

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Solution

The fourth proportional to 307.51, 461.03 and 209.76 is: 314.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.51 : 461.03 = 209.76 : x
  2. Step 2: Convert to fraction form
    307.51/461.03 = 209.76/x
  3. Step 3: Cross multiply
    307.51x = 461.03 × 209.76
  4. Step 4: Simplify right side
    307.51x = 96,702.88
  5. Step 5: Solve for x
    x = 96,702.88/307.51
  6. Step 6: Final answer
    x = 314.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.