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Finding the Fourth Proportional to 306.81, 423.88 and 260.67

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Solution

The fourth proportional to 306.81, 423.88 and 260.67 is: 360.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.81 : 423.88 = 260.67 : x
  2. Step 2: Convert to fraction form
    306.81/423.88 = 260.67/x
  3. Step 3: Cross multiply
    306.81x = 423.88 × 260.67
  4. Step 4: Simplify right side
    306.81x = 110,492.82
  5. Step 5: Solve for x
    x = 110,492.82/306.81
  6. Step 6: Final answer
    x = 360.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.