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Finding the Fourth Proportional to 3,106.79, 4,660.27 and 915.60

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Solution

The fourth proportional to 3,106.79, 4,660.27 and 915.60 is: 1,373.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.79 : 4,660.27 = 915.60 : x
  2. Step 2: Convert to fraction form
    3,106.79/4,660.27 = 915.60/x
  3. Step 3: Cross multiply
    3,106.79x = 4,660.27 × 915.60
  4. Step 4: Simplify right side
    3,106.79x = 4,266,923.45
  5. Step 5: Solve for x
    x = 4,266,923.45/3,106.79
  6. Step 6: Final answer
    x = 1,373.42

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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.