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Finding the Fourth Proportional to 1,431,978.41, 1,975,638.47 and 887,918.42

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Solution

The fourth proportional to 1,431,978.41, 1,975,638.47 and 887,918.42 is: 1,225,022.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,978.41 : 1,975,638.47 = 887,918.42 : x
  2. Step 2: Convert to fraction form
    1,431,978.41/1,975,638.47 = 887,918.42/x
  3. Step 3: Cross multiply
    1,431,978.41x = 1,975,638.47 × 887,918.42
  4. Step 4: Simplify right side
    1,431,978.41x = 1,754,205,789,273.12
  5. Step 5: Solve for x
    x = 1,754,205,789,273.12/1,431,978.41
  6. Step 6: Final answer
    x = 1,225,022.51

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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.