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Finding the Fourth Proportional to 2,978,864.64, 4,110,710.40 and 1,620,743.04

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Solution

The fourth proportional to 2,978,864.64, 4,110,710.40 and 1,620,743.04 is: 2,236,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,864.64 : 4,110,710.40 = 1,620,743.04 : x
  2. Step 2: Convert to fraction form
    2,978,864.64/4,110,710.40 = 1,620,743.04/x
  3. Step 3: Cross multiply
    2,978,864.64x = 4,110,710.40 × 1,620,743.04
  4. Step 4: Simplify right side
    2,978,864.64x = 6,662,405,270,255.62
  5. Step 5: Solve for x
    x = 6,662,405,270,255.62/2,978,864.64
  6. Step 6: Final answer
    x = 2,236,558.58

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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.