Home / 1,557.33-2,149.53-919.83

Finding the Fourth Proportional to 1,557.33, 2,149.53 and 919.83

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Solution

The fourth proportional to 1,557.33, 2,149.53 and 919.83 is: 1,269.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.33 : 2,149.53 = 919.83 : x
  2. Step 2: Convert to fraction form
    1,557.33/2,149.53 = 919.83/x
  3. Step 3: Cross multiply
    1,557.33x = 2,149.53 × 919.83
  4. Step 4: Simplify right side
    1,557.33x = 1,977,202.18
  5. Step 5: Solve for x
    x = 1,977,202.18/1,557.33
  6. Step 6: Final answer
    x = 1,269.61

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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.