Home / 1,284.88-1,927.40-515.38

Finding the Fourth Proportional to 1,284.88, 1,927.40 and 515.38

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Solution

The fourth proportional to 1,284.88, 1,927.40 and 515.38 is: 773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.88 : 1,927.40 = 515.38 : x
  2. Step 2: Convert to fraction form
    1,284.88/1,927.40 = 515.38/x
  3. Step 3: Cross multiply
    1,284.88x = 1,927.40 × 515.38
  4. Step 4: Simplify right side
    1,284.88x = 993,343.41
  5. Step 5: Solve for x
    x = 993,343.41/1,284.88
  6. Step 6: Final answer
    x = 773.10

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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.