Home / 1,521.25-2,099.43-858.10

Finding the Fourth Proportional to 1,521.25, 2,099.43 and 858.10

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Solution

The fourth proportional to 1,521.25, 2,099.43 and 858.10 is: 1,184.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.25 : 2,099.43 = 858.10 : x
  2. Step 2: Convert to fraction form
    1,521.25/2,099.43 = 858.10/x
  3. Step 3: Cross multiply
    1,521.25x = 2,099.43 × 858.10
  4. Step 4: Simplify right side
    1,521.25x = 1,801,520.88
  5. Step 5: Solve for x
    x = 1,801,520.88/1,521.25
  6. Step 6: Final answer
    x = 1,184.24

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1.5x scale

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.