Home / 1,347.08-1,861.26-1,172.12

Finding the Fourth Proportional to 1,347.08, 1,861.26 and 1,172.12

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Solution

The fourth proportional to 1,347.08, 1,861.26 and 1,172.12 is: 1,619.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.08 : 1,861.26 = 1,172.12 : x
  2. Step 2: Convert to fraction form
    1,347.08/1,861.26 = 1,172.12/x
  3. Step 3: Cross multiply
    1,347.08x = 1,861.26 × 1,172.12
  4. Step 4: Simplify right side
    1,347.08x = 2,181,620.07
  5. Step 5: Solve for x
    x = 2,181,620.07/1,347.08
  6. Step 6: Final answer
    x = 1,619.52

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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.