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Finding the Fourth Proportional to 1,321,662.21, 1,824,187.19 and 749,018.13

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Solution

The fourth proportional to 1,321,662.21, 1,824,187.19 and 749,018.13 is: 1,033,811.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,662.21 : 1,824,187.19 = 749,018.13 : x
  2. Step 2: Convert to fraction form
    1,321,662.21/1,824,187.19 = 749,018.13/x
  3. Step 3: Cross multiply
    1,321,662.21x = 1,824,187.19 × 749,018.13
  4. Step 4: Simplify right side
    1,321,662.21x = 1,366,349,277,823.75
  5. Step 5: Solve for x
    x = 1,366,349,277,823.75/1,321,662.21
  6. Step 6: Final answer
    x = 1,033,811.26

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Double scale
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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.