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Finding the Fourth Proportional to 1,425,223.05, 1,966,783.49 and 771,843.77

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Solution

The fourth proportional to 1,425,223.05, 1,966,783.49 and 771,843.77 is: 1,065,131.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,223.05 : 1,966,783.49 = 771,843.77 : x
  2. Step 2: Convert to fraction form
    1,425,223.05/1,966,783.49 = 771,843.77/x
  3. Step 3: Cross multiply
    1,425,223.05x = 1,966,783.49 × 771,843.77
  4. Step 4: Simplify right side
    1,425,223.05x = 1,518,049,580,272.07
  5. Step 5: Solve for x
    x = 1,518,049,580,272.07/1,425,223.05
  6. Step 6: Final answer
    x = 1,065,131.23

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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.