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Finding the Fourth Proportional to 6,505,700.78, 8,977,920.21 and 3,605,140.08

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Solution

The fourth proportional to 6,505,700.78, 8,977,920.21 and 3,605,140.08 is: 4,975,122.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,505,700.78 : 8,977,920.21 = 3,605,140.08 : x
  2. Step 2: Convert to fraction form
    6,505,700.78/8,977,920.21 = 3,605,140.08/x
  3. Step 3: Cross multiply
    6,505,700.78x = 8,977,920.21 × 3,605,140.08
  4. Step 4: Simplify right side
    6,505,700.78x = 32,366,659,975,187.49
  5. Step 5: Solve for x
    x = 32,366,659,975,187.49/6,505,700.78
  6. Step 6: Final answer
    x = 4,975,122.75

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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.