Home / 1,218.41-1,827.61-385.53

Finding the Fourth Proportional to 1,218.41, 1,827.61 and 385.53

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Solution

The fourth proportional to 1,218.41, 1,827.61 and 385.53 is: 578.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.41 : 1,827.61 = 385.53 : x
  2. Step 2: Convert to fraction form
    1,218.41/1,827.61 = 385.53/x
  3. Step 3: Cross multiply
    1,218.41x = 1,827.61 × 385.53
  4. Step 4: Simplify right side
    1,218.41x = 704,598.48
  5. Step 5: Solve for x
    x = 704,598.48/1,218.41
  6. Step 6: Final answer
    x = 578.29

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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.