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Finding the Fourth Proportional to 1,978,065.50, 2,729,730.40 and 1,072,648.22

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Solution

The fourth proportional to 1,978,065.50, 2,729,730.40 and 1,072,648.22 is: 1,480,254.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,065.50 : 2,729,730.40 = 1,072,648.22 : x
  2. Step 2: Convert to fraction form
    1,978,065.50/2,729,730.40 = 1,072,648.22/x
  3. Step 3: Cross multiply
    1,978,065.50x = 2,729,730.40 × 1,072,648.22
  4. Step 4: Simplify right side
    1,978,065.50x = 2,928,040,454,639.89
  5. Step 5: Solve for x
    x = 2,928,040,454,639.89/1,978,065.50
  6. Step 6: Final answer
    x = 1,480,254.55

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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.