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Finding the Fourth Proportional to 3,122.64, 4,684.68 and 931.32

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Solution

The fourth proportional to 3,122.64, 4,684.68 and 931.32 is: 1,397.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.64 : 4,684.68 = 931.32 : x
  2. Step 2: Convert to fraction form
    3,122.64/4,684.68 = 931.32/x
  3. Step 3: Cross multiply
    3,122.64x = 4,684.68 × 931.32
  4. Step 4: Simplify right side
    3,122.64x = 4,362,936.18
  5. Step 5: Solve for x
    x = 4,362,936.18/3,122.64
  6. Step 6: Final answer
    x = 1,397.19

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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.