Home / 1,290.40-1,935.52-559.44

Finding the Fourth Proportional to 1,290.40, 1,935.52 and 559.44

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Solution

The fourth proportional to 1,290.40, 1,935.52 and 559.44 is: 839.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.40 : 1,935.52 = 559.44 : x
  2. Step 2: Convert to fraction form
    1,290.40/1,935.52 = 559.44/x
  3. Step 3: Cross multiply
    1,290.40x = 1,935.52 × 559.44
  4. Step 4: Simplify right side
    1,290.40x = 1,082,807.31
  5. Step 5: Solve for x
    x = 1,082,807.31/1,290.40
  6. Step 6: Final answer
    x = 839.13

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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.