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Finding the Fourth Proportional to 554,034.18, 764,576.08 and 312,328.56

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Solution

The fourth proportional to 554,034.18, 764,576.08 and 312,328.56 is: 431,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,034.18 : 764,576.08 = 312,328.56 : x
  2. Step 2: Convert to fraction form
    554,034.18/764,576.08 = 312,328.56/x
  3. Step 3: Cross multiply
    554,034.18x = 764,576.08 × 312,328.56
  4. Step 4: Simplify right side
    554,034.18x = 238,798,946,076.85
  5. Step 5: Solve for x
    x = 238,798,946,076.85/554,034.18
  6. Step 6: Final answer
    x = 431,018.44

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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.