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Finding the Fourth Proportional to 2,557.07, 3,836.15 and 891.24

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Solution

The fourth proportional to 2,557.07, 3,836.15 and 891.24 is: 1,337.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.07 : 3,836.15 = 891.24 : x
  2. Step 2: Convert to fraction form
    2,557.07/3,836.15 = 891.24/x
  3. Step 3: Cross multiply
    2,557.07x = 3,836.15 × 891.24
  4. Step 4: Simplify right side
    2,557.07x = 3,418,925.87
  5. Step 5: Solve for x
    x = 3,418,925.87/2,557.07
  6. Step 6: Final answer
    x = 1,337.05

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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.