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Finding the Fourth Proportional to 6,437,798.89, 8,881,965.18 and 3,989,516.63

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Solution

The fourth proportional to 6,437,798.89, 8,881,965.18 and 3,989,516.63 is: 5,504,171.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,437,798.89 : 8,881,965.18 = 3,989,516.63 : x
  2. Step 2: Convert to fraction form
    6,437,798.89/8,881,965.18 = 3,989,516.63/x
  3. Step 3: Cross multiply
    6,437,798.89x = 8,881,965.18 × 3,989,516.63
  4. Step 4: Simplify right side
    6,437,798.89x = 35,434,747,748,281.12
  5. Step 5: Solve for x
    x = 35,434,747,748,281.12/6,437,798.89
  6. Step 6: Final answer
    x = 5,504,171.28

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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.