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Finding the Fourth Proportional to 807.34, 1,110.77 and 712.42

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Solution

The fourth proportional to 807.34, 1,110.77 and 712.42 is: 980.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.34 : 1,110.77 = 712.42 : x
  2. Step 2: Convert to fraction form
    807.34/1,110.77 = 712.42/x
  3. Step 3: Cross multiply
    807.34x = 1,110.77 × 712.42
  4. Step 4: Simplify right side
    807.34x = 791,329.21
  5. Step 5: Solve for x
    x = 791,329.21/807.34
  6. Step 6: Final answer
    x = 980.17

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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.