Home / 1,292.37-1,938.57-318.48

Finding the Fourth Proportional to 1,292.37, 1,938.57 and 318.48

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Solution

The fourth proportional to 1,292.37, 1,938.57 and 318.48 is: 477.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.37 : 1,938.57 = 318.48 : x
  2. Step 2: Convert to fraction form
    1,292.37/1,938.57 = 318.48/x
  3. Step 3: Cross multiply
    1,292.37x = 1,938.57 × 318.48
  4. Step 4: Simplify right side
    1,292.37x = 617,395.77
  5. Step 5: Solve for x
    x = 617,395.77/1,292.37
  6. Step 6: Final answer
    x = 477.72

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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.