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Finding the Third Proportional to 555.29 and 859.77

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Solution

The third proportional to 555.29 and 859.77 is: 1,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.29 : 859.77 = 859.77 : x
  2. Step 2: Convert to fraction form
    555.29/859.77 = 859.77/x
  3. Step 3: Cross multiply
    555.29x = 859.77 × 859.77
  4. Step 4: Simplify right side
    555.29x = 739,203.96
  5. Step 5: Solve for x
    x = 739,203.96/555.29
  6. Step 6: Final answer
    x = 1,331.20

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.