Home / 3,720.61-5,580.29-1,640.05

Finding the Fourth Proportional to 3,720.61, 5,580.29 and 1,640.05

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Solution

The fourth proportional to 3,720.61, 5,580.29 and 1,640.05 is: 2,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.61 : 5,580.29 = 1,640.05 : x
  2. Step 2: Convert to fraction form
    3,720.61/5,580.29 = 1,640.05/x
  3. Step 3: Cross multiply
    3,720.61x = 5,580.29 × 1,640.05
  4. Step 4: Simplify right side
    3,720.61x = 9,151,954.61
  5. Step 5: Solve for x
    x = 9,151,954.61/3,720.61
  6. Step 6: Final answer
    x = 2,459.80

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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.