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Finding the Fourth Proportional to 1,787,495.68, 2,679,731.82 and 775,857.28

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Solution

The fourth proportional to 1,787,495.68, 2,679,731.82 and 775,857.28 is: 1,163,129.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,495.68 : 2,679,731.82 = 775,857.28 : x
  2. Step 2: Convert to fraction form
    1,787,495.68/2,679,731.82 = 775,857.28/x
  3. Step 3: Cross multiply
    1,787,495.68x = 2,679,731.82 × 775,857.28
  4. Step 4: Simplify right side
    1,787,495.68x = 2,079,089,440,994.65
  5. Step 5: Solve for x
    x = 2,079,089,440,994.65/1,787,495.68
  6. Step 6: Final answer
    x = 1,163,129.77

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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.