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Finding the Fourth Proportional to 3,309.51, 4,987.52 and 2,980.86

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Solution

The fourth proportional to 3,309.51, 4,987.52 and 2,980.86 is: 4,492.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,309.51 : 4,987.52 = 2,980.86 : x
  2. Step 2: Convert to fraction form
    3,309.51/4,987.52 = 2,980.86/x
  3. Step 3: Cross multiply
    3,309.51x = 4,987.52 × 2,980.86
  4. Step 4: Simplify right side
    3,309.51x = 14,867,102.67
  5. Step 5: Solve for x
    x = 14,867,102.67/3,309.51
  6. Step 6: Final answer
    x = 4,492.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.