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Finding the Fourth Proportional to 2,655,746.40, 3,978,370.80 and 1,455,520.80

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Solution

The fourth proportional to 2,655,746.40, 3,978,370.80 and 1,455,520.80 is: 2,180,404.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655,746.40 : 3,978,370.80 = 1,455,520.80 : x
  2. Step 2: Convert to fraction form
    2,655,746.40/3,978,370.80 = 1,455,520.80/x
  3. Step 3: Cross multiply
    2,655,746.40x = 3,978,370.80 × 1,455,520.80
  4. Step 4: Simplify right side
    2,655,746.40x = 5,790,601,449,512.64
  5. Step 5: Solve for x
    x = 5,790,601,449,512.64/2,655,746.40
  6. Step 6: Final answer
    x = 2,180,404.52

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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.