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Finding the Fourth Proportional to 1,687.99, 2,328.45 and 1,015.33

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Solution

The fourth proportional to 1,687.99, 2,328.45 and 1,015.33 is: 1,400.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.99 : 2,328.45 = 1,015.33 : x
  2. Step 2: Convert to fraction form
    1,687.99/2,328.45 = 1,015.33/x
  3. Step 3: Cross multiply
    1,687.99x = 2,328.45 × 1,015.33
  4. Step 4: Simplify right side
    1,687.99x = 2,364,145.14
  5. Step 5: Solve for x
    x = 2,364,145.14/1,687.99
  6. Step 6: Final answer
    x = 1,400.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.