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Finding the Fourth Proportional to 2,153,965.29, 2,972,978.64 and 1,338,784.63

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Solution

The fourth proportional to 2,153,965.29, 2,972,978.64 and 1,338,784.63 is: 1,847,837.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153,965.29 : 2,972,978.64 = 1,338,784.63 : x
  2. Step 2: Convert to fraction form
    2,153,965.29/2,972,978.64 = 1,338,784.63/x
  3. Step 3: Cross multiply
    2,153,965.29x = 2,972,978.64 × 1,338,784.63
  4. Step 4: Simplify right side
    2,153,965.29x = 3,980,178,086,991.49
  5. Step 5: Solve for x
    x = 3,980,178,086,991.49/2,153,965.29
  6. Step 6: Final answer
    x = 1,847,837.62

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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.