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Finding the Fourth Proportional to 304.72, 457.08 and 208.72

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Solution

The fourth proportional to 304.72, 457.08 and 208.72 is: 313.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.72 : 457.08 = 208.72 : x
  2. Step 2: Convert to fraction form
    304.72/457.08 = 208.72/x
  3. Step 3: Cross multiply
    304.72x = 457.08 × 208.72
  4. Step 4: Simplify right side
    304.72x = 95,401.74
  5. Step 5: Solve for x
    x = 95,401.74/304.72
  6. Step 6: Final answer
    x = 313.08

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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.