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Finding the Fourth Proportional to 288.84, 433.02 and 208.20

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Solution

The fourth proportional to 288.84, 433.02 and 208.20 is: 312.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.84 : 433.02 = 208.20 : x
  2. Step 2: Convert to fraction form
    288.84/433.02 = 208.20/x
  3. Step 3: Cross multiply
    288.84x = 433.02 × 208.20
  4. Step 4: Simplify right side
    288.84x = 90,154.76
  5. Step 5: Solve for x
    x = 90,154.76/288.84
  6. Step 6: Final answer
    x = 312.13

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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.