Home / 2,153.36-2,971.64-1,209.02

Finding the Fourth Proportional to 2,153.36, 2,971.64 and 1,209.02

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Solution

The fourth proportional to 2,153.36, 2,971.64 and 1,209.02 is: 1,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.36 : 2,971.64 = 1,209.02 : x
  2. Step 2: Convert to fraction form
    2,153.36/2,971.64 = 1,209.02/x
  3. Step 3: Cross multiply
    2,153.36x = 2,971.64 × 1,209.02
  4. Step 4: Simplify right side
    2,153.36x = 3,592,772.19
  5. Step 5: Solve for x
    x = 3,592,772.19/2,153.36
  6. Step 6: Final answer
    x = 1,668.45

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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.