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Finding the Fourth Proportional to 942.77, 1,301.47 and 628.56

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Solution

The fourth proportional to 942.77, 1,301.47 and 628.56 is: 867.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.77 : 1,301.47 = 628.56 : x
  2. Step 2: Convert to fraction form
    942.77/1,301.47 = 628.56/x
  3. Step 3: Cross multiply
    942.77x = 1,301.47 × 628.56
  4. Step 4: Simplify right side
    942.77x = 818,050.41
  5. Step 5: Solve for x
    x = 818,050.41/942.77
  6. Step 6: Final answer
    x = 867.71

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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.