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Finding the Fourth Proportional to 1,424,045.72, 1,964,794.46 and 811,975.30

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Solution

The fourth proportional to 1,424,045.72, 1,964,794.46 and 811,975.30 is: 1,120,304.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424,045.72 : 1,964,794.46 = 811,975.30 : x
  2. Step 2: Convert to fraction form
    1,424,045.72/1,964,794.46 = 811,975.30/x
  3. Step 3: Cross multiply
    1,424,045.72x = 1,964,794.46 × 811,975.30
  4. Step 4: Simplify right side
    1,424,045.72x = 1,595,364,571,096.84
  5. Step 5: Solve for x
    x = 1,595,364,571,096.84/1,424,045.72
  6. Step 6: Final answer
    x = 1,120,304.32

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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.