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Finding the Fourth Proportional to 3,925.35, 5,415.35 and 3,428.01

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Solution

The fourth proportional to 3,925.35, 5,415.35 and 3,428.01 is: 4,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,925.35 : 5,415.35 = 3,428.01 : x
  2. Step 2: Convert to fraction form
    3,925.35/5,415.35 = 3,428.01/x
  3. Step 3: Cross multiply
    3,925.35x = 5,415.35 × 3,428.01
  4. Step 4: Simplify right side
    3,925.35x = 18,563,856.81
  5. Step 5: Solve for x
    x = 18,563,856.81/3,925.35
  6. Step 6: Final answer
    x = 4,729.22

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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.