Home / 1,140.15-1,710.30-318.41

Finding the Fourth Proportional to 1,140.15, 1,710.30 and 318.41

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Solution

The fourth proportional to 1,140.15, 1,710.30 and 318.41 is: 477.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.15 : 1,710.30 = 318.41 : x
  2. Step 2: Convert to fraction form
    1,140.15/1,710.30 = 318.41/x
  3. Step 3: Cross multiply
    1,140.15x = 1,710.30 × 318.41
  4. Step 4: Simplify right side
    1,140.15x = 544,566.48
  5. Step 5: Solve for x
    x = 544,566.48/1,140.15
  6. Step 6: Final answer
    x = 477.63

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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.