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Finding the Fourth Proportional to 1,521.59, 2,099.73 and 858.35

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Solution

The fourth proportional to 1,521.59, 2,099.73 and 858.35 is: 1,184.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.59 : 2,099.73 = 858.35 : x
  2. Step 2: Convert to fraction form
    1,521.59/2,099.73 = 858.35/x
  3. Step 3: Cross multiply
    1,521.59x = 2,099.73 × 858.35
  4. Step 4: Simplify right side
    1,521.59x = 1,802,292.75
  5. Step 5: Solve for x
    x = 1,802,292.75/1,521.59
  6. Step 6: Final answer
    x = 1,184.48

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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.