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Finding the Fourth Proportional to 1,369.99, 2,055.39 and 885.61

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Solution

The fourth proportional to 1,369.99, 2,055.39 and 885.61 is: 1,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.99 : 2,055.39 = 885.61 : x
  2. Step 2: Convert to fraction form
    1,369.99/2,055.39 = 885.61/x
  3. Step 3: Cross multiply
    1,369.99x = 2,055.39 × 885.61
  4. Step 4: Simplify right side
    1,369.99x = 1,820,273.94
  5. Step 5: Solve for x
    x = 1,820,273.94/1,369.99
  6. Step 6: Final answer
    x = 1,328.68

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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.