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Finding the Fourth Proportional to 800.34, 1,104.90 and 505.68

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Solution

The fourth proportional to 800.34, 1,104.90 and 505.68 is: 698.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.34 : 1,104.90 = 505.68 : x
  2. Step 2: Convert to fraction form
    800.34/1,104.90 = 505.68/x
  3. Step 3: Cross multiply
    800.34x = 1,104.90 × 505.68
  4. Step 4: Simplify right side
    800.34x = 558,725.83
  5. Step 5: Solve for x
    x = 558,725.83/800.34
  6. Step 6: Final answer
    x = 698.11

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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.