Home / 4,987.40-7,478.48-2,214.90

Finding the Fourth Proportional to 4,987.40, 7,478.48 and 2,214.90

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Solution

The fourth proportional to 4,987.40, 7,478.48 and 2,214.90 is: 3,321.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.40 : 7,478.48 = 2,214.90 : x
  2. Step 2: Convert to fraction form
    4,987.40/7,478.48 = 2,214.90/x
  3. Step 3: Cross multiply
    4,987.40x = 7,478.48 × 2,214.90
  4. Step 4: Simplify right side
    4,987.40x = 16,564,090.89
  5. Step 5: Solve for x
    x = 16,564,090.89/4,987.40
  6. Step 6: Final answer
    x = 3,321.19

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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.