Home / 1,010.24-1,515.43-279.81

Finding the Fourth Proportional to 1,010.24, 1,515.43 and 279.81

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Solution

The fourth proportional to 1,010.24, 1,515.43 and 279.81 is: 419.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.24 : 1,515.43 = 279.81 : x
  2. Step 2: Convert to fraction form
    1,010.24/1,515.43 = 279.81/x
  3. Step 3: Cross multiply
    1,010.24x = 1,515.43 × 279.81
  4. Step 4: Simplify right side
    1,010.24x = 424,024.89
  5. Step 5: Solve for x
    x = 424,024.89/1,010.24
  6. Step 6: Final answer
    x = 419.73

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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.