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Finding the Fourth Proportional to 710.83, 981.48 and 699.49

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Solution

The fourth proportional to 710.83, 981.48 and 699.49 is: 965.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.83 : 981.48 = 699.49 : x
  2. Step 2: Convert to fraction form
    710.83/981.48 = 699.49/x
  3. Step 3: Cross multiply
    710.83x = 981.48 × 699.49
  4. Step 4: Simplify right side
    710.83x = 686,535.45
  5. Step 5: Solve for x
    x = 686,535.45/710.83
  6. Step 6: Final answer
    x = 965.82

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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.