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Finding the Fourth Proportional to 2,798.61, 3,861.18 and 1,802.13

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Solution

The fourth proportional to 2,798.61, 3,861.18 and 1,802.13 is: 2,486.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.61 : 3,861.18 = 1,802.13 : x
  2. Step 2: Convert to fraction form
    2,798.61/3,861.18 = 1,802.13/x
  3. Step 3: Cross multiply
    2,798.61x = 3,861.18 × 1,802.13
  4. Step 4: Simplify right side
    2,798.61x = 6,958,348.31
  5. Step 5: Solve for x
    x = 6,958,348.31/2,798.61
  6. Step 6: Final answer
    x = 2,486.36

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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.