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Finding the Fourth Proportional to 2,431, 3,354.69 and 1,368.78

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Solution

The fourth proportional to 2,431, 3,354.69 and 1,368.78 is: 1,888.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431 : 3,354.69 = 1,368.78 : x
  2. Step 2: Convert to fraction form
    2,431/3,354.69 = 1,368.78/x
  3. Step 3: Cross multiply
    2,431x = 3,354.69 × 1,368.78
  4. Step 4: Simplify right side
    2,431x = 4,591,832.58
  5. Step 5: Solve for x
    x = 4,591,832.58/2,431
  6. Step 6: Final answer
    x = 1,888.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.