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Finding the Fourth Proportional to 6,396,940.80, 8,822,061.76 and 5,307,486.72

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Solution

The fourth proportional to 6,396,940.80, 8,822,061.76 and 5,307,486.72 is: 7,319,588.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,396,940.80 : 8,822,061.76 = 5,307,486.72 : x
  2. Step 2: Convert to fraction form
    6,396,940.80/8,822,061.76 = 5,307,486.72/x
  3. Step 3: Cross multiply
    6,396,940.80x = 8,822,061.76 × 5,307,486.72
  4. Step 4: Simplify right side
    6,396,940.80x = 46,822,975,634,219.82
  5. Step 5: Solve for x
    x = 46,822,975,634,219.82/6,396,940.80
  6. Step 6: Final answer
    x = 7,319,588.71

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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.