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Finding the Fourth Proportional to 744.36, 1,120.50 and 571.98

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Solution

The fourth proportional to 744.36, 1,120.50 and 571.98 is: 861.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.36 : 1,120.50 = 571.98 : x
  2. Step 2: Convert to fraction form
    744.36/1,120.50 = 571.98/x
  3. Step 3: Cross multiply
    744.36x = 1,120.50 × 571.98
  4. Step 4: Simplify right side
    744.36x = 640,903.59
  5. Step 5: Solve for x
    x = 640,903.59/744.36
  6. Step 6: Final answer
    x = 861.01

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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.