Home / 5,087.79-7,631.89-1,390.00

Finding the Fourth Proportional to 5,087.79, 7,631.89 and 1,390.00

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Solution

The fourth proportional to 5,087.79, 7,631.89 and 1,390.00 is: 2,085.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.79 : 7,631.89 = 1,390.00 : x
  2. Step 2: Convert to fraction form
    5,087.79/7,631.89 = 1,390.00/x
  3. Step 3: Cross multiply
    5,087.79x = 7,631.89 × 1,390.00
  4. Step 4: Simplify right side
    5,087.79x = 10,608,311.05
  5. Step 5: Solve for x
    x = 10,608,311.05/5,087.79
  6. Step 6: Final answer
    x = 2,085.05

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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.