Home / 1,290.48-1,935.76-521.04

Finding the Fourth Proportional to 1,290.48, 1,935.76 and 521.04

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Solution

The fourth proportional to 1,290.48, 1,935.76 and 521.04 is: 781.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.48 : 1,935.76 = 521.04 : x
  2. Step 2: Convert to fraction form
    1,290.48/1,935.76 = 521.04/x
  3. Step 3: Cross multiply
    1,290.48x = 1,935.76 × 521.04
  4. Step 4: Simplify right side
    1,290.48x = 1,008,608.39
  5. Step 5: Solve for x
    x = 1,008,608.39/1,290.48
  6. Step 6: Final answer
    x = 781.58

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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.