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Finding the Fourth Proportional to 3,216, 4,438.08 and 1,889.64

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Solution

The fourth proportional to 3,216, 4,438.08 and 1,889.64 is: 2,607.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216 : 4,438.08 = 1,889.64 : x
  2. Step 2: Convert to fraction form
    3,216/4,438.08 = 1,889.64/x
  3. Step 3: Cross multiply
    3,216x = 4,438.08 × 1,889.64
  4. Step 4: Simplify right side
    3,216x = 8,386,373.49
  5. Step 5: Solve for x
    x = 8,386,373.49/3,216
  6. Step 6: Final answer
    x = 2,607.70

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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.