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Finding the Fourth Proportional to 1,861.71, 2,788.65 and 886.83

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Solution

The fourth proportional to 1,861.71, 2,788.65 and 886.83 is: 1,328.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.71 : 2,788.65 = 886.83 : x
  2. Step 2: Convert to fraction form
    1,861.71/2,788.65 = 886.83/x
  3. Step 3: Cross multiply
    1,861.71x = 2,788.65 × 886.83
  4. Step 4: Simplify right side
    1,861.71x = 2,473,058.48
  5. Step 5: Solve for x
    x = 2,473,058.48/1,861.71
  6. Step 6: Final answer
    x = 1,328.38

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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.