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Finding the Fourth Proportional to 2,172.19, 3,258.63 and 711.01

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Solution

The fourth proportional to 2,172.19, 3,258.63 and 711.01 is: 1,066.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.19 : 3,258.63 = 711.01 : x
  2. Step 2: Convert to fraction form
    2,172.19/3,258.63 = 711.01/x
  3. Step 3: Cross multiply
    2,172.19x = 3,258.63 × 711.01
  4. Step 4: Simplify right side
    2,172.19x = 2,316,918.52
  5. Step 5: Solve for x
    x = 2,316,918.52/2,172.19
  6. Step 6: Final answer
    x = 1,066.63

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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.