Home / 1,027.20-1,417.76-634.56

Finding the Fourth Proportional to 1,027.20, 1,417.76 and 634.56

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Solution

The fourth proportional to 1,027.20, 1,417.76 and 634.56 is: 875.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.20 : 1,417.76 = 634.56 : x
  2. Step 2: Convert to fraction form
    1,027.20/1,417.76 = 634.56/x
  3. Step 3: Cross multiply
    1,027.20x = 1,417.76 × 634.56
  4. Step 4: Simplify right side
    1,027.20x = 899,653.79
  5. Step 5: Solve for x
    x = 899,653.79/1,027.20
  6. Step 6: Final answer
    x = 875.83

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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.