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Finding the Fourth Proportional to 2,585.04, 3,878.28 and 853.71

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Solution

The fourth proportional to 2,585.04, 3,878.28 and 853.71 is: 1,280.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.04 : 3,878.28 = 853.71 : x
  2. Step 2: Convert to fraction form
    2,585.04/3,878.28 = 853.71/x
  3. Step 3: Cross multiply
    2,585.04x = 3,878.28 × 853.71
  4. Step 4: Simplify right side
    2,585.04x = 3,310,926.42
  5. Step 5: Solve for x
    x = 3,310,926.42/2,585.04
  6. Step 6: Final answer
    x = 1,280.80

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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.