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Finding the Fourth Proportional to 2,876.58, 3,970.62 and 2,130.30

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Solution

The fourth proportional to 2,876.58, 3,970.62 and 2,130.30 is: 2,940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.58 : 3,970.62 = 2,130.30 : x
  2. Step 2: Convert to fraction form
    2,876.58/3,970.62 = 2,130.30/x
  3. Step 3: Cross multiply
    2,876.58x = 3,970.62 × 2,130.30
  4. Step 4: Simplify right side
    2,876.58x = 8,458,611.79
  5. Step 5: Solve for x
    x = 8,458,611.79/2,876.58
  6. Step 6: Final answer
    x = 2,940.51

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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.