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Finding the Fourth Proportional to 5,187.98, 7,780.57 and 1,901.09

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Solution

The fourth proportional to 5,187.98, 7,780.57 and 1,901.09 is: 2,851.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.98 : 7,780.57 = 1,901.09 : x
  2. Step 2: Convert to fraction form
    5,187.98/7,780.57 = 1,901.09/x
  3. Step 3: Cross multiply
    5,187.98x = 7,780.57 × 1,901.09
  4. Step 4: Simplify right side
    5,187.98x = 14,791,563.82
  5. Step 5: Solve for x
    x = 14,791,563.82/5,187.98
  6. Step 6: Final answer
    x = 2,851.12

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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.