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Finding the Fourth Proportional to 1,703.67, 2,555.91 and 663.71

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Solution

The fourth proportional to 1,703.67, 2,555.91 and 663.71 is: 995.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,703.67 : 2,555.91 = 663.71 : x
  2. Step 2: Convert to fraction form
    1,703.67/2,555.91 = 663.71/x
  3. Step 3: Cross multiply
    1,703.67x = 2,555.91 × 663.71
  4. Step 4: Simplify right side
    1,703.67x = 1,696,370.25
  5. Step 5: Solve for x
    x = 1,696,370.25/1,703.67
  6. Step 6: Final answer
    x = 995.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.