Home / 2,172.23-2,999.16-1,387.34

Finding the Fourth Proportional to 2,172.23, 2,999.16 and 1,387.34

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Solution

The fourth proportional to 2,172.23, 2,999.16 and 1,387.34 is: 1,915.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.23 : 2,999.16 = 1,387.34 : x
  2. Step 2: Convert to fraction form
    2,172.23/2,999.16 = 1,387.34/x
  3. Step 3: Cross multiply
    2,172.23x = 2,999.16 × 1,387.34
  4. Step 4: Simplify right side
    2,172.23x = 4,160,854.63
  5. Step 5: Solve for x
    x = 4,160,854.63/2,172.23
  6. Step 6: Final answer
    x = 1,915.48

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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.