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Finding the Fourth Proportional to 4,679.28, 6,984.78 and 4,316.40

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Solution

The fourth proportional to 4,679.28, 6,984.78 and 4,316.40 is: 6,443.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,679.28 : 6,984.78 = 4,316.40 : x
  2. Step 2: Convert to fraction form
    4,679.28/6,984.78 = 4,316.40/x
  3. Step 3: Cross multiply
    4,679.28x = 6,984.78 × 4,316.40
  4. Step 4: Simplify right side
    4,679.28x = 30,149,104.39
  5. Step 5: Solve for x
    x = 30,149,104.39/4,679.28
  6. Step 6: Final answer
    x = 6,443.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.