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Finding the Fourth Proportional to 347.09, 478.51 and 247.56

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Solution

The fourth proportional to 347.09, 478.51 and 247.56 is: 341.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.09 : 478.51 = 247.56 : x
  2. Step 2: Convert to fraction form
    347.09/478.51 = 247.56/x
  3. Step 3: Cross multiply
    347.09x = 478.51 × 247.56
  4. Step 4: Simplify right side
    347.09x = 118,459.32
  5. Step 5: Solve for x
    x = 118,459.32/347.09
  6. Step 6: Final answer
    x = 341.29

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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.