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Finding the Fourth Proportional to 2,788.80, 3,847.84 and 1,670.16

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Solution

The fourth proportional to 2,788.80, 3,847.84 and 1,670.16 is: 2,304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.80 : 3,847.84 = 1,670.16 : x
  2. Step 2: Convert to fraction form
    2,788.80/3,847.84 = 1,670.16/x
  3. Step 3: Cross multiply
    2,788.80x = 3,847.84 × 1,670.16
  4. Step 4: Simplify right side
    2,788.80x = 6,426,508.45
  5. Step 5: Solve for x
    x = 6,426,508.45/2,788.80
  6. Step 6: Final answer
    x = 2,304.40

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1.5x scale

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.