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Finding the Fourth Proportional to 306.30, 459.48 and 86.93

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Solution

The fourth proportional to 306.30, 459.48 and 86.93 is: 130.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.30 : 459.48 = 86.93 : x
  2. Step 2: Convert to fraction form
    306.30/459.48 = 86.93/x
  3. Step 3: Cross multiply
    306.30x = 459.48 × 86.93
  4. Step 4: Simplify right side
    306.30x = 39,941.01
  5. Step 5: Solve for x
    x = 39,941.01/306.30
  6. Step 6: Final answer
    x = 130.40

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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.