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Finding the Fourth Proportional to 1,340,355.93, 1,849,709.91 and 728,508.51

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Solution

The fourth proportional to 1,340,355.93, 1,849,709.91 and 728,508.51 is: 1,005,351.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340,355.93 : 1,849,709.91 = 728,508.51 : x
  2. Step 2: Convert to fraction form
    1,340,355.93/1,849,709.91 = 728,508.51/x
  3. Step 3: Cross multiply
    1,340,355.93x = 1,849,709.91 × 728,508.51
  4. Step 4: Simplify right side
    1,340,355.93x = 1,347,529,410,466.33
  5. Step 5: Solve for x
    x = 1,347,529,410,466.33/1,340,355.93
  6. Step 6: Final answer
    x = 1,005,351.92

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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.