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Finding the Fourth Proportional to 314.45, 434.07 and 259.44

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Solution

The fourth proportional to 314.45, 434.07 and 259.44 is: 358.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.45 : 434.07 = 259.44 : x
  2. Step 2: Convert to fraction form
    314.45/434.07 = 259.44/x
  3. Step 3: Cross multiply
    314.45x = 434.07 × 259.44
  4. Step 4: Simplify right side
    314.45x = 112,615.12
  5. Step 5: Solve for x
    x = 112,615.12/314.45
  6. Step 6: Final answer
    x = 358.13

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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.