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Finding the Fourth Proportional to 2,655,506.40, 3,978,010.80 and 1,455,280.80

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Solution

The fourth proportional to 2,655,506.40, 3,978,010.80 and 1,455,280.80 is: 2,180,044.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655,506.40 : 3,978,010.80 = 1,455,280.80 : x
  2. Step 2: Convert to fraction form
    2,655,506.40/3,978,010.80 = 1,455,280.80/x
  3. Step 3: Cross multiply
    2,655,506.40x = 3,978,010.80 × 1,455,280.80
  4. Step 4: Simplify right side
    2,655,506.40x = 5,789,122,739,432.64
  5. Step 5: Solve for x
    x = 5,789,122,739,432.64/2,655,506.40
  6. Step 6: Final answer
    x = 2,180,044.73

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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.