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Finding the Fourth Proportional to 554,115.36, 764,661.87 and 312,394.46

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Solution

The fourth proportional to 554,115.36, 764,661.87 and 312,394.46 is: 431,094.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,115.36 : 764,661.87 = 312,394.46 : x
  2. Step 2: Convert to fraction form
    554,115.36/764,661.87 = 312,394.46/x
  3. Step 3: Cross multiply
    554,115.36x = 764,661.87 × 312,394.46
  4. Step 4: Simplify right side
    554,115.36x = 238,876,128,137.93
  5. Step 5: Solve for x
    x = 238,876,128,137.93/554,115.36
  6. Step 6: Final answer
    x = 431,094.58

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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.