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Finding the Fourth Proportional to 347.04, 478.86 and 212.40

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Solution

The fourth proportional to 347.04, 478.86 and 212.40 is: 293.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.04 : 478.86 = 212.40 : x
  2. Step 2: Convert to fraction form
    347.04/478.86 = 212.40/x
  3. Step 3: Cross multiply
    347.04x = 478.86 × 212.40
  4. Step 4: Simplify right side
    347.04x = 101,709.86
  5. Step 5: Solve for x
    x = 101,709.86/347.04
  6. Step 6: Final answer
    x = 293.08

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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.