Home / 1,317.12-1,977.12-900.96

Finding the Fourth Proportional to 1,317.12, 1,977.12 and 900.96

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Solution

The fourth proportional to 1,317.12, 1,977.12 and 900.96 is: 1,352.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.12 : 1,977.12 = 900.96 : x
  2. Step 2: Convert to fraction form
    1,317.12/1,977.12 = 900.96/x
  3. Step 3: Cross multiply
    1,317.12x = 1,977.12 × 900.96
  4. Step 4: Simplify right side
    1,317.12x = 1,781,306.04
  5. Step 5: Solve for x
    x = 1,781,306.04/1,317.12
  6. Step 6: Final answer
    x = 1,352.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.