Home / 1,921.04-2,649.48-1,222.16

Finding the Fourth Proportional to 1,921.04, 2,649.48 and 1,222.16

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Solution

The fourth proportional to 1,921.04, 2,649.48 and 1,222.16 is: 1,685.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.04 : 2,649.48 = 1,222.16 : x
  2. Step 2: Convert to fraction form
    1,921.04/2,649.48 = 1,222.16/x
  3. Step 3: Cross multiply
    1,921.04x = 2,649.48 × 1,222.16
  4. Step 4: Simplify right side
    1,921.04x = 3,238,088.48
  5. Step 5: Solve for x
    x = 3,238,088.48/1,921.04
  6. Step 6: Final answer
    x = 1,685.59

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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.