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Finding the Third Proportional to 528.19 and 783.42

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Solution

The third proportional to 528.19 and 783.42 is: 1,161.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.19 : 783.42 = 783.42 : x
  2. Step 2: Convert to fraction form
    528.19/783.42 = 783.42/x
  3. Step 3: Cross multiply
    528.19x = 783.42 × 783.42
  4. Step 4: Simplify right side
    528.19x = 613,749.83
  5. Step 5: Solve for x
    x = 613,749.83/528.19
  6. Step 6: Final answer
    x = 1,161.99

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.