Home / 1,128.58-1,557.90-976.54

Finding the Fourth Proportional to 1,128.58, 1,557.90 and 976.54

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Solution

The fourth proportional to 1,128.58, 1,557.90 and 976.54 is: 1,348.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.58 : 1,557.90 = 976.54 : x
  2. Step 2: Convert to fraction form
    1,128.58/1,557.90 = 976.54/x
  3. Step 3: Cross multiply
    1,128.58x = 1,557.90 × 976.54
  4. Step 4: Simplify right side
    1,128.58x = 1,521,351.67
  5. Step 5: Solve for x
    x = 1,521,351.67/1,128.58
  6. Step 6: Final answer
    x = 1,348.02

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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.