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Finding the Fourth Proportional to 703.55, 1,051.21 and 679.34

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Solution

The fourth proportional to 703.55, 1,051.21 and 679.34 is: 1,015.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.55 : 1,051.21 = 679.34 : x
  2. Step 2: Convert to fraction form
    703.55/1,051.21 = 679.34/x
  3. Step 3: Cross multiply
    703.55x = 1,051.21 × 679.34
  4. Step 4: Simplify right side
    703.55x = 714,129.00
  5. Step 5: Solve for x
    x = 714,129.00/703.55
  6. Step 6: Final answer
    x = 1,015.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.