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Finding the Fourth Proportional to 3,389.40, 4,677.89 and 1,973.12

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Solution

The fourth proportional to 3,389.40, 4,677.89 and 1,973.12 is: 2,723.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.40 : 4,677.89 = 1,973.12 : x
  2. Step 2: Convert to fraction form
    3,389.40/4,677.89 = 1,973.12/x
  3. Step 3: Cross multiply
    3,389.40x = 4,677.89 × 1,973.12
  4. Step 4: Simplify right side
    3,389.40x = 9,230,005.06
  5. Step 5: Solve for x
    x = 9,230,005.06/3,389.40
  6. Step 6: Final answer
    x = 2,723.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.