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Finding the Fourth Proportional to 306.95, 459.60 and 253.08

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Solution

The fourth proportional to 306.95, 459.60 and 253.08 is: 378.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.95 : 459.60 = 253.08 : x
  2. Step 2: Convert to fraction form
    306.95/459.60 = 253.08/x
  3. Step 3: Cross multiply
    306.95x = 459.60 × 253.08
  4. Step 4: Simplify right side
    306.95x = 116,315.57
  5. Step 5: Solve for x
    x = 116,315.57/306.95
  6. Step 6: Final answer
    x = 378.95

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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.