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Finding the Fourth Proportional to 553,724.67, 764,308.94 and 321,210.37

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Solution

The fourth proportional to 553,724.67, 764,308.94 and 321,210.37 is: 443,368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,724.67 : 764,308.94 = 321,210.37 : x
  2. Step 2: Convert to fraction form
    553,724.67/764,308.94 = 321,210.37/x
  3. Step 3: Cross multiply
    553,724.67x = 764,308.94 × 321,210.37
  4. Step 4: Simplify right side
    553,724.67x = 245,503,957,411.71
  5. Step 5: Solve for x
    x = 245,503,957,411.71/553,724.67
  6. Step 6: Final answer
    x = 443,368.29

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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.