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Finding the Fourth Proportional to 1,557.91, 2,149.91 and 894.80

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Solution

The fourth proportional to 1,557.91, 2,149.91 and 894.80 is: 1,234.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.91 : 2,149.91 = 894.80 : x
  2. Step 2: Convert to fraction form
    1,557.91/2,149.91 = 894.80/x
  3. Step 3: Cross multiply
    1,557.91x = 2,149.91 × 894.80
  4. Step 4: Simplify right side
    1,557.91x = 1,923,739.47
  5. Step 5: Solve for x
    x = 1,923,739.47/1,557.91
  6. Step 6: Final answer
    x = 1,234.82

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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.