Home / 1,318.31-1,977.50-440.82

Finding the Fourth Proportional to 1,318.31, 1,977.50 and 440.82

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Solution

The fourth proportional to 1,318.31, 1,977.50 and 440.82 is: 661.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.31 : 1,977.50 = 440.82 : x
  2. Step 2: Convert to fraction form
    1,318.31/1,977.50 = 440.82/x
  3. Step 3: Cross multiply
    1,318.31x = 1,977.50 × 440.82
  4. Step 4: Simplify right side
    1,318.31x = 871,719.35
  5. Step 5: Solve for x
    x = 871,719.35/1,318.31
  6. Step 6: Final answer
    x = 661.24

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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.