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Finding the Fourth Proportional to 507.39, 761.08 and 263.40

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Solution

The fourth proportional to 507.39, 761.08 and 263.40 is: 395.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.39 : 761.08 = 263.40 : x
  2. Step 2: Convert to fraction form
    507.39/761.08 = 263.40/x
  3. Step 3: Cross multiply
    507.39x = 761.08 × 263.40
  4. Step 4: Simplify right side
    507.39x = 200,468.47
  5. Step 5: Solve for x
    x = 200,468.47/507.39
  6. Step 6: Final answer
    x = 395.10

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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.