Home / 1,557.21-2,148.89-894.12

Finding the Fourth Proportional to 1,557.21, 2,148.89 and 894.12

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Solution

The fourth proportional to 1,557.21, 2,148.89 and 894.12 is: 1,233.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.21 : 2,148.89 = 894.12 : x
  2. Step 2: Convert to fraction form
    1,557.21/2,148.89 = 894.12/x
  3. Step 3: Cross multiply
    1,557.21x = 2,148.89 × 894.12
  4. Step 4: Simplify right side
    1,557.21x = 1,921,361.06
  5. Step 5: Solve for x
    x = 1,921,361.06/1,557.21
  6. Step 6: Final answer
    x = 1,233.85

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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.