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Finding the Fourth Proportional to 2,172.99, 3,259.47 and 712.13

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Solution

The fourth proportional to 2,172.99, 3,259.47 and 712.13 is: 1,068.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.99 : 3,259.47 = 712.13 : x
  2. Step 2: Convert to fraction form
    2,172.99/3,259.47 = 712.13/x
  3. Step 3: Cross multiply
    2,172.99x = 3,259.47 × 712.13
  4. Step 4: Simplify right side
    2,172.99x = 2,321,152.74
  5. Step 5: Solve for x
    x = 2,321,152.74/2,172.99
  6. Step 6: Final answer
    x = 1,068.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.