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Finding the Fourth Proportional to 690,016.40, 952,109.88 and 399,524.48

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Solution

The fourth proportional to 690,016.40, 952,109.88 and 399,524.48 is: 551,278.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,016.40 : 952,109.88 = 399,524.48 : x
  2. Step 2: Convert to fraction form
    690,016.40/952,109.88 = 399,524.48/x
  3. Step 3: Cross multiply
    690,016.40x = 952,109.88 × 399,524.48
  4. Step 4: Simplify right side
    690,016.40x = 380,391,204,709.86
  5. Step 5: Solve for x
    x = 380,391,204,709.86/690,016.40
  6. Step 6: Final answer
    x = 551,278.50

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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.