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Finding the Fourth Proportional to 504.90, 757.76 and 261.50

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Solution

The fourth proportional to 504.90, 757.76 and 261.50 is: 392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.90 : 757.76 = 261.50 : x
  2. Step 2: Convert to fraction form
    504.90/757.76 = 261.50/x
  3. Step 3: Cross multiply
    504.90x = 757.76 × 261.50
  4. Step 4: Simplify right side
    504.90x = 198,149.14
  5. Step 5: Solve for x
    x = 198,149.14/504.90
  6. Step 6: Final answer
    x = 392.45

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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.