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Finding the Fourth Proportional to 798.45, 1,103.39 and 651.03

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Solution

The fourth proportional to 798.45, 1,103.39 and 651.03 is: 899.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.45 : 1,103.39 = 651.03 : x
  2. Step 2: Convert to fraction form
    798.45/1,103.39 = 651.03/x
  3. Step 3: Cross multiply
    798.45x = 1,103.39 × 651.03
  4. Step 4: Simplify right side
    798.45x = 718,331.22
  5. Step 5: Solve for x
    x = 718,331.22/798.45
  6. Step 6: Final answer
    x = 899.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.