Home / 5,429.60-7,489.86-3,190.40

Finding the Fourth Proportional to 5,429.60, 7,489.86 and 3,190.40

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Solution

The fourth proportional to 5,429.60, 7,489.86 and 3,190.40 is: 4,401.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,429.60 : 7,489.86 = 3,190.40 : x
  2. Step 2: Convert to fraction form
    5,429.60/7,489.86 = 3,190.40/x
  3. Step 3: Cross multiply
    5,429.60x = 7,489.86 × 3,190.40
  4. Step 4: Simplify right side
    5,429.60x = 23,895,649.34
  5. Step 5: Solve for x
    x = 23,895,649.34/5,429.60
  6. Step 6: Final answer
    x = 4,401.00

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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.