Home / 2,430.20-3,645.30-1,389.80

Finding the Fourth Proportional to 2,430.20, 3,645.30 and 1,389.80

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Solution

The fourth proportional to 2,430.20, 3,645.30 and 1,389.80 is: 2,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430.20 : 3,645.30 = 1,389.80 : x
  2. Step 2: Convert to fraction form
    2,430.20/3,645.30 = 1,389.80/x
  3. Step 3: Cross multiply
    2,430.20x = 3,645.30 × 1,389.80
  4. Step 4: Simplify right side
    2,430.20x = 5,066,237.94
  5. Step 5: Solve for x
    x = 5,066,237.94/2,430.20
  6. Step 6: Final answer
    x = 2,084.70

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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.