Home / 1,557.11-2,148.84-858.48

Finding the Fourth Proportional to 1,557.11, 2,148.84 and 858.48

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Solution

The fourth proportional to 1,557.11, 2,148.84 and 858.48 is: 1,184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.11 : 2,148.84 = 858.48 : x
  2. Step 2: Convert to fraction form
    1,557.11/2,148.84 = 858.48/x
  3. Step 3: Cross multiply
    1,557.11x = 2,148.84 × 858.48
  4. Step 4: Simplify right side
    1,557.11x = 1,844,736.16
  5. Step 5: Solve for x
    x = 1,844,736.16/1,557.11
  6. Step 6: Final answer
    x = 1,184.72

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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.