Home / 2,129.08-2,938.40-1,244.90

Finding the Fourth Proportional to 2,129.08, 2,938.40 and 1,244.90

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Solution

The fourth proportional to 2,129.08, 2,938.40 and 1,244.90 is: 1,718.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.08 : 2,938.40 = 1,244.90 : x
  2. Step 2: Convert to fraction form
    2,129.08/2,938.40 = 1,244.90/x
  3. Step 3: Cross multiply
    2,129.08x = 2,938.40 × 1,244.90
  4. Step 4: Simplify right side
    2,129.08x = 3,658,014.16
  5. Step 5: Solve for x
    x = 3,658,014.16/2,129.08
  6. Step 6: Final answer
    x = 1,718.12

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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.