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Finding the Fourth Proportional to 550,688.63, 759,998.40 and 321,319.81

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Solution

The fourth proportional to 550,688.63, 759,998.40 and 321,319.81 is: 443,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,688.63 : 759,998.40 = 321,319.81 : x
  2. Step 2: Convert to fraction form
    550,688.63/759,998.40 = 321,319.81/x
  3. Step 3: Cross multiply
    550,688.63x = 759,998.40 × 321,319.81
  4. Step 4: Simplify right side
    550,688.63x = 244,202,541,348.28
  5. Step 5: Solve for x
    x = 244,202,541,348.28/550,688.63
  6. Step 6: Final answer
    x = 443,449.40

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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.