Home / 1,290.20-1,935.63-559.91

Finding the Fourth Proportional to 1,290.20, 1,935.63 and 559.91

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Solution

The fourth proportional to 1,290.20, 1,935.63 and 559.91 is: 840.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.20 : 1,935.63 = 559.91 : x
  2. Step 2: Convert to fraction form
    1,290.20/1,935.63 = 559.91/x
  3. Step 3: Cross multiply
    1,290.20x = 1,935.63 × 559.91
  4. Step 4: Simplify right side
    1,290.20x = 1,083,783.43
  5. Step 5: Solve for x
    x = 1,083,783.43/1,290.20
  6. Step 6: Final answer
    x = 840.02

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.