Home / 1,240.11-1,860.75-510.21

Finding the Fourth Proportional to 1,240.11, 1,860.75 and 510.21

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Solution

The fourth proportional to 1,240.11, 1,860.75 and 510.21 is: 765.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.11 : 1,860.75 = 510.21 : x
  2. Step 2: Convert to fraction form
    1,240.11/1,860.75 = 510.21/x
  3. Step 3: Cross multiply
    1,240.11x = 1,860.75 × 510.21
  4. Step 4: Simplify right side
    1,240.11x = 949,373.26
  5. Step 5: Solve for x
    x = 949,373.26/1,240.11
  6. Step 6: Final answer
    x = 765.56

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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.