Home / 2,798.02-3,861.45-1,678.90

Finding the Fourth Proportional to 2,798.02, 3,861.45 and 1,678.90

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Solution

The fourth proportional to 2,798.02, 3,861.45 and 1,678.90 is: 2,316.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,798.02 : 3,861.45 = 1,678.90 : x
  2. Step 2: Convert to fraction form
    2,798.02/3,861.45 = 1,678.90/x
  3. Step 3: Cross multiply
    2,798.02x = 3,861.45 × 1,678.90
  4. Step 4: Simplify right side
    2,798.02x = 6,482,992.13
  5. Step 5: Solve for x
    x = 6,482,992.13/2,798.02
  6. Step 6: Final answer
    x = 2,316.99

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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.