Home / 3,810.40-5,715.60-1,620.16

Finding the Fourth Proportional to 3,810.40, 5,715.60 and 1,620.16

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Solution

The fourth proportional to 3,810.40, 5,715.60 and 1,620.16 is: 2,430.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,810.40 : 5,715.60 = 1,620.16 : x
  2. Step 2: Convert to fraction form
    3,810.40/5,715.60 = 1,620.16/x
  3. Step 3: Cross multiply
    3,810.40x = 5,715.60 × 1,620.16
  4. Step 4: Simplify right side
    3,810.40x = 9,260,186.50
  5. Step 5: Solve for x
    x = 9,260,186.50/3,810.40
  6. Step 6: Final answer
    x = 2,430.24

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Similar ratio
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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.