Home / 1,557.32-2,149.06-858.70

Finding the Fourth Proportional to 1,557.32, 2,149.06 and 858.70

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Solution

The fourth proportional to 1,557.32, 2,149.06 and 858.70 is: 1,184.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.32 : 2,149.06 = 858.70 : x
  2. Step 2: Convert to fraction form
    1,557.32/2,149.06 = 858.70/x
  3. Step 3: Cross multiply
    1,557.32x = 2,149.06 × 858.70
  4. Step 4: Simplify right side
    1,557.32x = 1,845,397.82
  5. Step 5: Solve for x
    x = 1,845,397.82/1,557.32
  6. Step 6: Final answer
    x = 1,184.98

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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.