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Finding the Fourth Proportional to 507.78, 701.19 and 342

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Solution

The fourth proportional to 507.78, 701.19 and 342 is: 472.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.78 : 701.19 = 342 : x
  2. Step 2: Convert to fraction form
    507.78/701.19 = 342/x
  3. Step 3: Cross multiply
    507.78x = 701.19 × 342
  4. Step 4: Simplify right side
    507.78x = 239,806.98
  5. Step 5: Solve for x
    x = 239,806.98/507.78
  6. Step 6: Final answer
    x = 472.27

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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.