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Finding the Third Proportional to 711.25 and 1,530.50

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Solution

The third proportional to 711.25 and 1,530.50 is: 3,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.25 : 1,530.50 = 1,530.50 : x
  2. Step 2: Convert to fraction form
    711.25/1,530.50 = 1,530.50/x
  3. Step 3: Cross multiply
    711.25x = 1,530.50 × 1,530.50
  4. Step 4: Simplify right side
    711.25x = 2,342,430.25
  5. Step 5: Solve for x
    x = 2,342,430.25/711.25
  6. Step 6: Final answer
    x = 3,293.40

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.