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Finding the Third Proportional to 830.72 and 1,128.66

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Solution

The third proportional to 830.72 and 1,128.66 is: 1,533.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.72 : 1,128.66 = 1,128.66 : x
  2. Step 2: Convert to fraction form
    830.72/1,128.66 = 1,128.66/x
  3. Step 3: Cross multiply
    830.72x = 1,128.66 × 1,128.66
  4. Step 4: Simplify right side
    830.72x = 1,273,864.93
  5. Step 5: Solve for x
    x = 1,273,864.93/830.72
  6. Step 6: Final answer
    x = 1,533.45

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.