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Finding the Fourth Proportional to 507.67, 760.64 and 342.78

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Solution

The fourth proportional to 507.67, 760.64 and 342.78 is: 513.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.67 : 760.64 = 342.78 : x
  2. Step 2: Convert to fraction form
    507.67/760.64 = 342.78/x
  3. Step 3: Cross multiply
    507.67x = 760.64 × 342.78
  4. Step 4: Simplify right side
    507.67x = 260,730.47
  5. Step 5: Solve for x
    x = 260,730.47/507.67
  6. Step 6: Final answer
    x = 513.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.