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Finding the Fourth Proportional to 722.70, 1,079.10 and 625.50

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Solution

The fourth proportional to 722.70, 1,079.10 and 625.50 is: 933.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.70 : 1,079.10 = 625.50 : x
  2. Step 2: Convert to fraction form
    722.70/1,079.10 = 625.50/x
  3. Step 3: Cross multiply
    722.70x = 1,079.10 × 625.50
  4. Step 4: Simplify right side
    722.70x = 674,977.05
  5. Step 5: Solve for x
    x = 674,977.05/722.70
  6. Step 6: Final answer
    x = 933.97

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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.