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Finding the Fourth Proportional to 3,420.66, 4,720.23 and 1,928.28

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Solution

The fourth proportional to 3,420.66, 4,720.23 and 1,928.28 is: 2,660.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.66 : 4,720.23 = 1,928.28 : x
  2. Step 2: Convert to fraction form
    3,420.66/4,720.23 = 1,928.28/x
  3. Step 3: Cross multiply
    3,420.66x = 4,720.23 × 1,928.28
  4. Step 4: Simplify right side
    3,420.66x = 9,101,925.10
  5. Step 5: Solve for x
    x = 9,101,925.10/3,420.66
  6. Step 6: Final answer
    x = 2,660.87

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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.