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Finding the Fourth Proportional to 1,522.99, 2,101.61 and 859.91

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Solution

The fourth proportional to 1,522.99, 2,101.61 and 859.91 is: 1,186.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,522.99 : 2,101.61 = 859.91 : x
  2. Step 2: Convert to fraction form
    1,522.99/2,101.61 = 859.91/x
  3. Step 3: Cross multiply
    1,522.99x = 2,101.61 × 859.91
  4. Step 4: Simplify right side
    1,522.99x = 1,807,193.37
  5. Step 5: Solve for x
    x = 1,807,193.37/1,522.99
  6. Step 6: Final answer
    x = 1,186.61

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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.