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Finding the Fourth Proportional to 7,417,815.20, 11,121,409.20 and 2,864,967.20

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Solution

The fourth proportional to 7,417,815.20, 11,121,409.20 and 2,864,967.20 is: 4,295,398.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,417,815.20 : 11,121,409.20 = 2,864,967.20 : x
  2. Step 2: Convert to fraction form
    7,417,815.20/11,121,409.20 = 2,864,967.20/x
  3. Step 3: Cross multiply
    7,417,815.20x = 11,121,409.20 × 2,864,967.20
  4. Step 4: Simplify right side
    7,417,815.20x = 31,862,472,575,778.24
  5. Step 5: Solve for x
    x = 31,862,472,575,778.24/7,417,815.20
  6. Step 6: Final answer
    x = 4,295,398.54

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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.