Home / 1,918.89-2,648.04-1,122.76

Finding the Fourth Proportional to 1,918.89, 2,648.04 and 1,122.76

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Solution

The fourth proportional to 1,918.89, 2,648.04 and 1,122.76 is: 1,549.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.89 : 2,648.04 = 1,122.76 : x
  2. Step 2: Convert to fraction form
    1,918.89/2,648.04 = 1,122.76/x
  3. Step 3: Cross multiply
    1,918.89x = 2,648.04 × 1,122.76
  4. Step 4: Simplify right side
    1,918.89x = 2,973,118.81
  5. Step 5: Solve for x
    x = 2,973,118.81/1,918.89
  6. Step 6: Final answer
    x = 1,549.40

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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.