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Finding the Fourth Proportional to 771.06, 1,160.78 and 703.02

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Solution

The fourth proportional to 771.06, 1,160.78 and 703.02 is: 1,058.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.06 : 1,160.78 = 703.02 : x
  2. Step 2: Convert to fraction form
    771.06/1,160.78 = 703.02/x
  3. Step 3: Cross multiply
    771.06x = 1,160.78 × 703.02
  4. Step 4: Simplify right side
    771.06x = 816,051.56
  5. Step 5: Solve for x
    x = 816,051.56/771.06
  6. Step 6: Final answer
    x = 1,058.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.