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Finding the Fourth Proportional to 6,653,998.80, 9,985,663.80 and 2,870,197.20

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Solution

The fourth proportional to 6,653,998.80, 9,985,663.80 and 2,870,197.20 is: 4,307,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,653,998.80 : 9,985,663.80 = 2,870,197.20 : x
  2. Step 2: Convert to fraction form
    6,653,998.80/9,985,663.80 = 2,870,197.20/x
  3. Step 3: Cross multiply
    6,653,998.80x = 9,985,663.80 × 2,870,197.20
  4. Step 4: Simplify right side
    6,653,998.80x = 28,660,824,278,901.36
  5. Step 5: Solve for x
    x = 28,660,824,278,901.36/6,653,998.80
  6. Step 6: Final answer
    x = 4,307,308.30

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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.