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Finding the Fourth Proportional to 1,279,377, 1,765,695.78 and 742,833

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Solution

The fourth proportional to 1,279,377, 1,765,695.78 and 742,833 is: 1,025,199.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,377 : 1,765,695.78 = 742,833 : x
  2. Step 2: Convert to fraction form
    1,279,377/1,765,695.78 = 742,833/x
  3. Step 3: Cross multiply
    1,279,377x = 1,765,695.78 × 742,833
  4. Step 4: Simplify right side
    1,279,377x = 1,311,617,093,344.74
  5. Step 5: Solve for x
    x = 1,311,617,093,344.74/1,279,377
  6. Step 6: Final answer
    x = 1,025,199.84

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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.