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Finding the Fourth Proportional to 1,079.33, 1,490.18 and 637.36

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Solution

The fourth proportional to 1,079.33, 1,490.18 and 637.36 is: 879.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.33 : 1,490.18 = 637.36 : x
  2. Step 2: Convert to fraction form
    1,079.33/1,490.18 = 637.36/x
  3. Step 3: Cross multiply
    1,079.33x = 1,490.18 × 637.36
  4. Step 4: Simplify right side
    1,079.33x = 949,774.21
  5. Step 5: Solve for x
    x = 949,774.21/1,079.33
  6. Step 6: Final answer
    x = 879.97

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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.