Home / 1,557.42-2,149.20-858.75

Finding the Fourth Proportional to 1,557.42, 2,149.20 and 858.75

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Solution

The fourth proportional to 1,557.42, 2,149.20 and 858.75 is: 1,185.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.42 : 2,149.20 = 858.75 : x
  2. Step 2: Convert to fraction form
    1,557.42/2,149.20 = 858.75/x
  3. Step 3: Cross multiply
    1,557.42x = 2,149.20 × 858.75
  4. Step 4: Simplify right side
    1,557.42x = 1,845,625.50
  5. Step 5: Solve for x
    x = 1,845,625.50/1,557.42
  6. Step 6: Final answer
    x = 1,185.05

Related Problems

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Half scale
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Double scale
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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.