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Finding the Fourth Proportional to 340.36, 469.14 and 318.76

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Solution

The fourth proportional to 340.36, 469.14 and 318.76 is: 439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.36 : 469.14 = 318.76 : x
  2. Step 2: Convert to fraction form
    340.36/469.14 = 318.76/x
  3. Step 3: Cross multiply
    340.36x = 469.14 × 318.76
  4. Step 4: Simplify right side
    340.36x = 149,543.07
  5. Step 5: Solve for x
    x = 149,543.07/340.36
  6. Step 6: Final answer
    x = 439.37

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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.