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Finding the Fourth Proportional to 701.66, 1,051.40 and 518.20

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Solution

The fourth proportional to 701.66, 1,051.40 and 518.20 is: 776.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.66 : 1,051.40 = 518.20 : x
  2. Step 2: Convert to fraction form
    701.66/1,051.40 = 518.20/x
  3. Step 3: Cross multiply
    701.66x = 1,051.40 × 518.20
  4. Step 4: Simplify right side
    701.66x = 544,835.48
  5. Step 5: Solve for x
    x = 544,835.48/701.66
  6. Step 6: Final answer
    x = 776.49

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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.