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Finding the Fourth Proportional to 2,058.87, 3,087.95 and 672.02

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Solution

The fourth proportional to 2,058.87, 3,087.95 and 672.02 is: 1,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,058.87 : 3,087.95 = 672.02 : x
  2. Step 2: Convert to fraction form
    2,058.87/3,087.95 = 672.02/x
  3. Step 3: Cross multiply
    2,058.87x = 3,087.95 × 672.02
  4. Step 4: Simplify right side
    2,058.87x = 2,075,145.36
  5. Step 5: Solve for x
    x = 2,075,145.36/2,058.87
  6. Step 6: Final answer
    x = 1,007.90

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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.