Home / 1,918.70-2,877.76-531.89

Finding the Fourth Proportional to 1,918.70, 2,877.76 and 531.89

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Solution

The fourth proportional to 1,918.70, 2,877.76 and 531.89 is: 797.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.70 : 2,877.76 = 531.89 : x
  2. Step 2: Convert to fraction form
    1,918.70/2,877.76 = 531.89/x
  3. Step 3: Cross multiply
    1,918.70x = 2,877.76 × 531.89
  4. Step 4: Simplify right side
    1,918.70x = 1,530,648.17
  5. Step 5: Solve for x
    x = 1,530,648.17/1,918.70
  6. Step 6: Final answer
    x = 797.75

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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.