Home / 1,917.42-2,876.28-618.89

Finding the Fourth Proportional to 1,917.42, 2,876.28 and 618.89

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Solution

The fourth proportional to 1,917.42, 2,876.28 and 618.89 is: 928.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.42 : 2,876.28 = 618.89 : x
  2. Step 2: Convert to fraction form
    1,917.42/2,876.28 = 618.89/x
  3. Step 3: Cross multiply
    1,917.42x = 2,876.28 × 618.89
  4. Step 4: Simplify right side
    1,917.42x = 1,780,105.63
  5. Step 5: Solve for x
    x = 1,780,105.63/1,917.42
  6. Step 6: Final answer
    x = 928.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.