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Finding the Fourth Proportional to 1,321,505.78, 1,823,619.57 and 748,534.46

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Solution

The fourth proportional to 1,321,505.78, 1,823,619.57 and 748,534.46 is: 1,032,944.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,505.78 : 1,823,619.57 = 748,534.46 : x
  2. Step 2: Convert to fraction form
    1,321,505.78/1,823,619.57 = 748,534.46/x
  3. Step 3: Cross multiply
    1,321,505.78x = 1,823,619.57 × 748,534.46
  4. Step 4: Simplify right side
    1,321,505.78x = 1,365,042,090,075.38
  5. Step 5: Solve for x
    x = 1,365,042,090,075.38/1,321,505.78
  6. Step 6: Final answer
    x = 1,032,944.47

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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.