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Finding the Fourth Proportional to 1,208,787.05, 1,811,353.73 and 808,711.64

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Solution

The fourth proportional to 1,208,787.05, 1,811,353.73 and 808,711.64 is: 1,211,845.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,787.05 : 1,811,353.73 = 808,711.64 : x
  2. Step 2: Convert to fraction form
    1,208,787.05/1,811,353.73 = 808,711.64/x
  3. Step 3: Cross multiply
    1,208,787.05x = 1,811,353.73 × 808,711.64
  4. Step 4: Simplify right side
    1,208,787.05x = 1,464,862,845,608.42
  5. Step 5: Solve for x
    x = 1,464,862,845,608.42/1,208,787.05
  6. Step 6: Final answer
    x = 1,211,845.25

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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.