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Finding the Fourth Proportional to 510.40, 703.86 and 379.72

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Solution

The fourth proportional to 510.40, 703.86 and 379.72 is: 523.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.40 : 703.86 = 379.72 : x
  2. Step 2: Convert to fraction form
    510.40/703.86 = 379.72/x
  3. Step 3: Cross multiply
    510.40x = 703.86 × 379.72
  4. Step 4: Simplify right side
    510.40x = 267,269.72
  5. Step 5: Solve for x
    x = 267,269.72/510.40
  6. Step 6: Final answer
    x = 523.65

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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.