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Finding the Fourth Proportional to 904.44, 1,247.94 and 511.56

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Solution

The fourth proportional to 904.44, 1,247.94 and 511.56 is: 705.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.44 : 1,247.94 = 511.56 : x
  2. Step 2: Convert to fraction form
    904.44/1,247.94 = 511.56/x
  3. Step 3: Cross multiply
    904.44x = 1,247.94 × 511.56
  4. Step 4: Simplify right side
    904.44x = 638,396.19
  5. Step 5: Solve for x
    x = 638,396.19/904.44
  6. Step 6: Final answer
    x = 705.85

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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.