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Finding the Fourth Proportional to 2,558.76, 3,838.86 and 915.54

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Solution

The fourth proportional to 2,558.76, 3,838.86 and 915.54 is: 1,373.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,558.76 : 3,838.86 = 915.54 : x
  2. Step 2: Convert to fraction form
    2,558.76/3,838.86 = 915.54/x
  3. Step 3: Cross multiply
    2,558.76x = 3,838.86 × 915.54
  4. Step 4: Simplify right side
    2,558.76x = 3,514,629.88
  5. Step 5: Solve for x
    x = 3,514,629.88/2,558.76
  6. Step 6: Final answer
    x = 1,373.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.