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Finding the Fourth Proportional to 2,890.56, 4,336.80 and 1,720.32

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Solution

The fourth proportional to 2,890.56, 4,336.80 and 1,720.32 is: 2,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.56 : 4,336.80 = 1,720.32 : x
  2. Step 2: Convert to fraction form
    2,890.56/4,336.80 = 1,720.32/x
  3. Step 3: Cross multiply
    2,890.56x = 4,336.80 × 1,720.32
  4. Step 4: Simplify right side
    2,890.56x = 7,460,683.78
  5. Step 5: Solve for x
    x = 7,460,683.78/2,890.56
  6. Step 6: Final answer
    x = 2,581.05

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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.