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Finding the Fourth Proportional to 648.38, 971.75 and 510.88

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Solution

The fourth proportional to 648.38, 971.75 and 510.88 is: 765.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.38 : 971.75 = 510.88 : x
  2. Step 2: Convert to fraction form
    648.38/971.75 = 510.88/x
  3. Step 3: Cross multiply
    648.38x = 971.75 × 510.88
  4. Step 4: Simplify right side
    648.38x = 496,442.66
  5. Step 5: Solve for x
    x = 496,442.66/648.38
  6. Step 6: Final answer
    x = 765.67

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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.