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Finding the Third Proportional to 319.88 and 510.19

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Solution

The third proportional to 319.88 and 510.19 is: 813.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.88 : 510.19 = 510.19 : x
  2. Step 2: Convert to fraction form
    319.88/510.19 = 510.19/x
  3. Step 3: Cross multiply
    319.88x = 510.19 × 510.19
  4. Step 4: Simplify right side
    319.88x = 260,291.29
  5. Step 5: Solve for x
    x = 260,291.29/319.88
  6. Step 6: Final answer
    x = 813.73

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.