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Finding the Fourth Proportional to 799.61, 1,102.75 and 612.77

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Solution

The fourth proportional to 799.61, 1,102.75 and 612.77 is: 845.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.61 : 1,102.75 = 612.77 : x
  2. Step 2: Convert to fraction form
    799.61/1,102.75 = 612.77/x
  3. Step 3: Cross multiply
    799.61x = 1,102.75 × 612.77
  4. Step 4: Simplify right side
    799.61x = 675,725.07
  5. Step 5: Solve for x
    x = 675,725.07/799.61
  6. Step 6: Final answer
    x = 845.07

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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.