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Finding the Fourth Proportional to 2,798.58, 3,861.95 and 1,539.66

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Solution

The fourth proportional to 2,798.58, 3,861.95 and 1,539.66 is: 2,124.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.58 : 3,861.95 = 1,539.66 : x
  2. Step 2: Convert to fraction form
    2,798.58/3,861.95 = 1,539.66/x
  3. Step 3: Cross multiply
    2,798.58x = 3,861.95 × 1,539.66
  4. Step 4: Simplify right side
    2,798.58x = 5,946,082.24
  5. Step 5: Solve for x
    x = 5,946,082.24/2,798.58
  6. Step 6: Final answer
    x = 2,124.68

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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.