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Finding the Fourth Proportional to 6,464.89, 8,920.87 and 4,339.99

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Solution

The fourth proportional to 6,464.89, 8,920.87 and 4,339.99 is: 5,988.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,464.89 : 8,920.87 = 4,339.99 : x
  2. Step 2: Convert to fraction form
    6,464.89/8,920.87 = 4,339.99/x
  3. Step 3: Cross multiply
    6,464.89x = 8,920.87 × 4,339.99
  4. Step 4: Simplify right side
    6,464.89x = 38,716,486.59
  5. Step 5: Solve for x
    x = 38,716,486.59/6,464.89
  6. Step 6: Final answer
    x = 5,988.73

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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.