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Finding the Fourth Proportional to 694,428.32, 958,348.30 and 388,486.45

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Solution

The fourth proportional to 694,428.32, 958,348.30 and 388,486.45 is: 536,132.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694,428.32 : 958,348.30 = 388,486.45 : x
  2. Step 2: Convert to fraction form
    694,428.32/958,348.30 = 388,486.45/x
  3. Step 3: Cross multiply
    694,428.32x = 958,348.30 × 388,486.45
  4. Step 4: Simplify right side
    694,428.32x = 372,305,328,930.54
  5. Step 5: Solve for x
    x = 372,305,328,930.54/694,428.32
  6. Step 6: Final answer
    x = 536,132.12

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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.