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Finding the Fourth Proportional to 4,975.64, 7,465.20 and 3,316.40

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Solution

The fourth proportional to 4,975.64, 7,465.20 and 3,316.40 is: 4,975.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,975.64 : 7,465.20 = 3,316.40 : x
  2. Step 2: Convert to fraction form
    4,975.64/7,465.20 = 3,316.40/x
  3. Step 3: Cross multiply
    4,975.64x = 7,465.20 × 3,316.40
  4. Step 4: Simplify right side
    4,975.64x = 24,757,589.28
  5. Step 5: Solve for x
    x = 24,757,589.28/4,975.64
  6. Step 6: Final answer
    x = 4,975.76

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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.