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Finding the Fourth Proportional to 1,240.68, 1,860.51 and 528.00

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Solution

The fourth proportional to 1,240.68, 1,860.51 and 528.00 is: 791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.68 : 1,860.51 = 528.00 : x
  2. Step 2: Convert to fraction form
    1,240.68/1,860.51 = 528.00/x
  3. Step 3: Cross multiply
    1,240.68x = 1,860.51 × 528.00
  4. Step 4: Simplify right side
    1,240.68x = 982,340.32
  5. Step 5: Solve for x
    x = 982,340.32/1,240.68
  6. Step 6: Final answer
    x = 791.78

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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.