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Finding the Fourth Proportional to 1,376,390.88, 1,899,355.23 and 764,583.30

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Solution

The fourth proportional to 1,376,390.88, 1,899,355.23 and 764,583.30 is: 1,055,089.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,376,390.88 : 1,899,355.23 = 764,583.30 : x
  2. Step 2: Convert to fraction form
    1,376,390.88/1,899,355.23 = 764,583.30/x
  3. Step 3: Cross multiply
    1,376,390.88x = 1,899,355.23 × 764,583.30
  4. Step 4: Simplify right side
    1,376,390.88x = 1,452,215,289,625.66
  5. Step 5: Solve for x
    x = 1,452,215,289,625.66/1,376,390.88
  6. Step 6: Final answer
    x = 1,055,089.30

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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.