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Finding the Fourth Proportional to 306.62, 457.76 and 260.50

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Solution

The fourth proportional to 306.62, 457.76 and 260.50 is: 388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.62 : 457.76 = 260.50 : x
  2. Step 2: Convert to fraction form
    306.62/457.76 = 260.50/x
  3. Step 3: Cross multiply
    306.62x = 457.76 × 260.50
  4. Step 4: Simplify right side
    306.62x = 119,246.48
  5. Step 5: Solve for x
    x = 119,246.48/306.62
  6. Step 6: Final answer
    x = 388.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.