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Finding the Fourth Proportional to 944.17, 1,303.47 and 661.02

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Solution

The fourth proportional to 944.17, 1,303.47 and 661.02 is: 912.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.17 : 1,303.47 = 661.02 : x
  2. Step 2: Convert to fraction form
    944.17/1,303.47 = 661.02/x
  3. Step 3: Cross multiply
    944.17x = 1,303.47 × 661.02
  4. Step 4: Simplify right side
    944.17x = 861,619.74
  5. Step 5: Solve for x
    x = 861,619.74/944.17
  6. Step 6: Final answer
    x = 912.57

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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.