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Finding the Fourth Proportional to 2,912.90, 4,368.01 and 938.16

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Solution

The fourth proportional to 2,912.90, 4,368.01 and 938.16 is: 1,406.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.90 : 4,368.01 = 938.16 : x
  2. Step 2: Convert to fraction form
    2,912.90/4,368.01 = 938.16/x
  3. Step 3: Cross multiply
    2,912.90x = 4,368.01 × 938.16
  4. Step 4: Simplify right side
    2,912.90x = 4,097,892.26
  5. Step 5: Solve for x
    x = 4,097,892.26/2,912.90
  6. Step 6: Final answer
    x = 1,406.81

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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.