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Finding the Fourth Proportional to 7,261,985.80, 10,892,978.70 and 2,213,288.20

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Solution

The fourth proportional to 7,261,985.80, 10,892,978.70 and 2,213,288.20 is: 3,319,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,261,985.80 : 10,892,978.70 = 2,213,288.20 : x
  2. Step 2: Convert to fraction form
    7,261,985.80/10,892,978.70 = 2,213,288.20/x
  3. Step 3: Cross multiply
    7,261,985.80x = 10,892,978.70 × 2,213,288.20
  4. Step 4: Simplify right side
    7,261,985.80x = 24,109,301,219,561.34
  5. Step 5: Solve for x
    x = 24,109,301,219,561.34/7,261,985.80
  6. Step 6: Final answer
    x = 3,319,932.30

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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.