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Finding the Fourth Proportional to 861.44, 1,190.53 and 651.54

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Solution

The fourth proportional to 861.44, 1,190.53 and 651.54 is: 900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.44 : 1,190.53 = 651.54 : x
  2. Step 2: Convert to fraction form
    861.44/1,190.53 = 651.54/x
  3. Step 3: Cross multiply
    861.44x = 1,190.53 × 651.54
  4. Step 4: Simplify right side
    861.44x = 775,677.92
  5. Step 5: Solve for x
    x = 775,677.92/861.44
  6. Step 6: Final answer
    x = 900.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.