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Finding the Fourth Proportional to 904.72, 1,250.21 and 683.28

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Solution

The fourth proportional to 904.72, 1,250.21 and 683.28 is: 944.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.72 : 1,250.21 = 683.28 : x
  2. Step 2: Convert to fraction form
    904.72/1,250.21 = 683.28/x
  3. Step 3: Cross multiply
    904.72x = 1,250.21 × 683.28
  4. Step 4: Simplify right side
    904.72x = 854,243.49
  5. Step 5: Solve for x
    x = 854,243.49/904.72
  6. Step 6: Final answer
    x = 944.21

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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.