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Finding the Fourth Proportional to 1,321,663.84, 1,823,968.19 and 748,815.64

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Solution

The fourth proportional to 1,321,663.84, 1,823,968.19 and 748,815.64 is: 1,033,406.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,663.84 : 1,823,968.19 = 748,815.64 : x
  2. Step 2: Convert to fraction form
    1,321,663.84/1,823,968.19 = 748,815.64/x
  3. Step 3: Cross multiply
    1,321,663.84x = 1,823,968.19 × 748,815.64
  4. Step 4: Simplify right side
    1,321,663.84x = 1,365,815,907,534.49
  5. Step 5: Solve for x
    x = 1,365,815,907,534.49/1,321,663.84
  6. Step 6: Final answer
    x = 1,033,406.43

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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.