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Finding the Fourth Proportional to 341.40, 470.02 and 258.40

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Solution

The fourth proportional to 341.40, 470.02 and 258.40 is: 355.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.40 : 470.02 = 258.40 : x
  2. Step 2: Convert to fraction form
    341.40/470.02 = 258.40/x
  3. Step 3: Cross multiply
    341.40x = 470.02 × 258.40
  4. Step 4: Simplify right side
    341.40x = 121,453.17
  5. Step 5: Solve for x
    x = 121,453.17/341.40
  6. Step 6: Final answer
    x = 355.75

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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.