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Finding the Fourth Proportional to 690,109.64, 952,131.48 and 388,245.32

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Solution

The fourth proportional to 690,109.64, 952,131.48 and 388,245.32 is: 535,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,109.64 : 952,131.48 = 388,245.32 : x
  2. Step 2: Convert to fraction form
    690,109.64/952,131.48 = 388,245.32/x
  3. Step 3: Cross multiply
    690,109.64x = 952,131.48 × 388,245.32
  4. Step 4: Simplify right side
    690,109.64x = 369,660,591,134.67
  5. Step 5: Solve for x
    x = 369,660,591,134.67/690,109.64
  6. Step 6: Final answer
    x = 535,654.87

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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.