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Finding the Fourth Proportional to 341.40, 470.80 and 288.94

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Solution

The fourth proportional to 341.40, 470.80 and 288.94 is: 398.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.40 : 470.80 = 288.94 : x
  2. Step 2: Convert to fraction form
    341.40/470.80 = 288.94/x
  3. Step 3: Cross multiply
    341.40x = 470.80 × 288.94
  4. Step 4: Simplify right side
    341.40x = 136,032.95
  5. Step 5: Solve for x
    x = 136,032.95/341.40
  6. Step 6: Final answer
    x = 398.46

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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.