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Finding the Fourth Proportional to 4,720.88, 7,068.96 and 3,978.51

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Solution

The fourth proportional to 4,720.88, 7,068.96 and 3,978.51 is: 5,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,720.88 : 7,068.96 = 3,978.51 : x
  2. Step 2: Convert to fraction form
    4,720.88/7,068.96 = 3,978.51/x
  3. Step 3: Cross multiply
    4,720.88x = 7,068.96 × 3,978.51
  4. Step 4: Simplify right side
    4,720.88x = 28,123,928.05
  5. Step 5: Solve for x
    x = 28,123,928.05/4,720.88
  6. Step 6: Final answer
    x = 5,957.35

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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.