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Finding the Fourth Proportional to 340.46, 469.97 and 257.59

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Solution

The fourth proportional to 340.46, 469.97 and 257.59 is: 355.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.46 : 469.97 = 257.59 : x
  2. Step 2: Convert to fraction form
    340.46/469.97 = 257.59/x
  3. Step 3: Cross multiply
    340.46x = 469.97 × 257.59
  4. Step 4: Simplify right side
    340.46x = 121,055.93
  5. Step 5: Solve for x
    x = 121,055.93/340.46
  6. Step 6: Final answer
    x = 355.57

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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.