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Finding the Fourth Proportional to 340.49, 509.76 and 308.05

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Solution

The fourth proportional to 340.49, 509.76 and 308.05 is: 461.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.49 : 509.76 = 308.05 : x
  2. Step 2: Convert to fraction form
    340.49/509.76 = 308.05/x
  3. Step 3: Cross multiply
    340.49x = 509.76 × 308.05
  4. Step 4: Simplify right side
    340.49x = 157,030.29
  5. Step 5: Solve for x
    x = 157,030.29/340.49
  6. Step 6: Final answer
    x = 461.19

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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.