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Finding the Fourth Proportional to 346.84, 478.74 and 207.05

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Solution

The fourth proportional to 346.84, 478.74 and 207.05 is: 285.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.84 : 478.74 = 207.05 : x
  2. Step 2: Convert to fraction form
    346.84/478.74 = 207.05/x
  3. Step 3: Cross multiply
    346.84x = 478.74 × 207.05
  4. Step 4: Simplify right side
    346.84x = 99,123.12
  5. Step 5: Solve for x
    x = 99,123.12/346.84
  6. Step 6: Final answer
    x = 285.79

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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.