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Finding the Fourth Proportional to 1,801.80, 2,486.70 and 1,015.86

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Solution

The fourth proportional to 1,801.80, 2,486.70 and 1,015.86 is: 1,402.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.80 : 2,486.70 = 1,015.86 : x
  2. Step 2: Convert to fraction form
    1,801.80/2,486.70 = 1,015.86/x
  3. Step 3: Cross multiply
    1,801.80x = 2,486.70 × 1,015.86
  4. Step 4: Simplify right side
    1,801.80x = 2,526,139.06
  5. Step 5: Solve for x
    x = 2,526,139.06/1,801.80
  6. Step 6: Final answer
    x = 1,402.01

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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.