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Finding the Fourth Proportional to 701.94, 1,051.68 and 518.46

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Solution

The fourth proportional to 701.94, 1,051.68 and 518.46 is: 776.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.94 : 1,051.68 = 518.46 : x
  2. Step 2: Convert to fraction form
    701.94/1,051.68 = 518.46/x
  3. Step 3: Cross multiply
    701.94x = 1,051.68 × 518.46
  4. Step 4: Simplify right side
    701.94x = 545,254.01
  5. Step 5: Solve for x
    x = 545,254.01/701.94
  6. Step 6: Final answer
    x = 776.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.