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Finding the Fourth Proportional to 699.25, 1,048.92 and 655.51

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Solution

The fourth proportional to 699.25, 1,048.92 and 655.51 is: 983.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.25 : 1,048.92 = 655.51 : x
  2. Step 2: Convert to fraction form
    699.25/1,048.92 = 655.51/x
  3. Step 3: Cross multiply
    699.25x = 1,048.92 × 655.51
  4. Step 4: Simplify right side
    699.25x = 687,577.55
  5. Step 5: Solve for x
    x = 687,577.55/699.25
  6. Step 6: Final answer
    x = 983.31

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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.