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Finding the Fourth Proportional to 3,106.33, 4,659.64 and 915.08

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Solution

The fourth proportional to 3,106.33, 4,659.64 and 915.08 is: 1,372.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.33 : 4,659.64 = 915.08 : x
  2. Step 2: Convert to fraction form
    3,106.33/4,659.64 = 915.08/x
  3. Step 3: Cross multiply
    3,106.33x = 4,659.64 × 915.08
  4. Step 4: Simplify right side
    3,106.33x = 4,263,917.79
  5. Step 5: Solve for x
    x = 4,263,917.79/3,106.33
  6. Step 6: Final answer
    x = 1,372.66

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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.