Home / 1,557.16-2,148.87-858.54

Finding the Fourth Proportional to 1,557.16, 2,148.87 and 858.54

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Solution

The fourth proportional to 1,557.16, 2,148.87 and 858.54 is: 1,184.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.16 : 2,148.87 = 858.54 : x
  2. Step 2: Convert to fraction form
    1,557.16/2,148.87 = 858.54/x
  3. Step 3: Cross multiply
    1,557.16x = 2,148.87 × 858.54
  4. Step 4: Simplify right side
    1,557.16x = 1,844,890.85
  5. Step 5: Solve for x
    x = 1,844,890.85/1,557.16
  6. Step 6: Final answer
    x = 1,184.78

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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.