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Finding the Fourth Proportional to 2,931.58, 4,399.16 and 2,658.16

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Solution

The fourth proportional to 2,931.58, 4,399.16 and 2,658.16 is: 3,988.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.58 : 4,399.16 = 2,658.16 : x
  2. Step 2: Convert to fraction form
    2,931.58/4,399.16 = 2,658.16/x
  3. Step 3: Cross multiply
    2,931.58x = 4,399.16 × 2,658.16
  4. Step 4: Simplify right side
    2,931.58x = 11,693,671.15
  5. Step 5: Solve for x
    x = 11,693,671.15/2,931.58
  6. Step 6: Final answer
    x = 3,988.86

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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.