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Finding the Fourth Proportional to 554,070, 764,583.70 and 321,478.96

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Solution

The fourth proportional to 554,070, 764,583.70 and 321,478.96 is: 443,621.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,070 : 764,583.70 = 321,478.96 : x
  2. Step 2: Convert to fraction form
    554,070/764,583.70 = 321,478.96/x
  3. Step 3: Cross multiply
    554,070x = 764,583.70 × 321,478.96
  4. Step 4: Simplify right side
    554,070x = 245,797,567,278.64
  5. Step 5: Solve for x
    x = 245,797,567,278.64/554,070
  6. Step 6: Final answer
    x = 443,621.87

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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.