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Finding the Fourth Proportional to 797.40, 1,100.72 and 714.36

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Solution

The fourth proportional to 797.40, 1,100.72 and 714.36 is: 986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.40 : 1,100.72 = 714.36 : x
  2. Step 2: Convert to fraction form
    797.40/1,100.72 = 714.36/x
  3. Step 3: Cross multiply
    797.40x = 1,100.72 × 714.36
  4. Step 4: Simplify right side
    797.40x = 786,310.34
  5. Step 5: Solve for x
    x = 786,310.34/797.40
  6. Step 6: Final answer
    x = 986.09

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1.5x scale

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.