Home / 1,918.91-2,878.16-620.07

Finding the Fourth Proportional to 1,918.91, 2,878.16 and 620.07

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Solution

The fourth proportional to 1,918.91, 2,878.16 and 620.07 is: 930.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.91 : 2,878.16 = 620.07 : x
  2. Step 2: Convert to fraction form
    1,918.91/2,878.16 = 620.07/x
  3. Step 3: Cross multiply
    1,918.91x = 2,878.16 × 620.07
  4. Step 4: Simplify right side
    1,918.91x = 1,784,657.57
  5. Step 5: Solve for x
    x = 1,784,657.57/1,918.91
  6. Step 6: Final answer
    x = 930.04

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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.