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Finding the Fourth Proportional to 690,419.82, 952,771.68 and 384,489.54

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Solution

The fourth proportional to 690,419.82, 952,771.68 and 384,489.54 is: 530,591.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,419.82 : 952,771.68 = 384,489.54 : x
  2. Step 2: Convert to fraction form
    690,419.82/952,771.68 = 384,489.54/x
  3. Step 3: Cross multiply
    690,419.82x = 952,771.68 × 384,489.54
  4. Step 4: Simplify right side
    690,419.82x = 366,330,744,968.23
  5. Step 5: Solve for x
    x = 366,330,744,968.23/690,419.82
  6. Step 6: Final answer
    x = 530,591.29

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1.5x scale

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.