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Finding the Fourth Proportional to 2,987.33, 4,479.88 and 878.33

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Solution

The fourth proportional to 2,987.33, 4,479.88 and 878.33 is: 1,317.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.33 : 4,479.88 = 878.33 : x
  2. Step 2: Convert to fraction form
    2,987.33/4,479.88 = 878.33/x
  3. Step 3: Cross multiply
    2,987.33x = 4,479.88 × 878.33
  4. Step 4: Simplify right side
    2,987.33x = 3,934,788.41
  5. Step 5: Solve for x
    x = 3,934,788.41/2,987.33
  6. Step 6: Final answer
    x = 1,317.16

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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.