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Finding the Fourth Proportional to 653.05, 985.39 and 627.74

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Solution

The fourth proportional to 653.05, 985.39 and 627.74 is: 947.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.05 : 985.39 = 627.74 : x
  2. Step 2: Convert to fraction form
    653.05/985.39 = 627.74/x
  3. Step 3: Cross multiply
    653.05x = 985.39 × 627.74
  4. Step 4: Simplify right side
    653.05x = 618,565.36
  5. Step 5: Solve for x
    x = 618,565.36/653.05
  6. Step 6: Final answer
    x = 947.19

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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.