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Finding the Fourth Proportional to 3,878.70, 5,818.05 and 1,570.20

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Solution

The fourth proportional to 3,878.70, 5,818.05 and 1,570.20 is: 2,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.70 : 5,818.05 = 1,570.20 : x
  2. Step 2: Convert to fraction form
    3,878.70/5,818.05 = 1,570.20/x
  3. Step 3: Cross multiply
    3,878.70x = 5,818.05 × 1,570.20
  4. Step 4: Simplify right side
    3,878.70x = 9,135,502.11
  5. Step 5: Solve for x
    x = 9,135,502.11/3,878.70
  6. Step 6: Final answer
    x = 2,355.30

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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.