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Finding the Fourth Proportional to 1,240.57, 1,860.90 and 510.04

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Solution

The fourth proportional to 1,240.57, 1,860.90 and 510.04 is: 765.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.57 : 1,860.90 = 510.04 : x
  2. Step 2: Convert to fraction form
    1,240.57/1,860.90 = 510.04/x
  3. Step 3: Cross multiply
    1,240.57x = 1,860.90 × 510.04
  4. Step 4: Simplify right side
    1,240.57x = 949,133.44
  5. Step 5: Solve for x
    x = 949,133.44/1,240.57
  6. Step 6: Final answer
    x = 765.08

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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.