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Finding the Fourth Proportional to 2,656.87, 3,987.38 and 1,840.87

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Solution

The fourth proportional to 2,656.87, 3,987.38 and 1,840.87 is: 2,762.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.87 : 3,987.38 = 1,840.87 : x
  2. Step 2: Convert to fraction form
    2,656.87/3,987.38 = 1,840.87/x
  3. Step 3: Cross multiply
    2,656.87x = 3,987.38 × 1,840.87
  4. Step 4: Simplify right side
    2,656.87x = 7,340,248.22
  5. Step 5: Solve for x
    x = 7,340,248.22/2,656.87
  6. Step 6: Final answer
    x = 2,762.74

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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.