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Finding the Fourth Proportional to 438,609.07, 605,380.50 and 285,376.93

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Solution

The fourth proportional to 438,609.07, 605,380.50 and 285,376.93 is: 393,885.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,609.07 : 605,380.50 = 285,376.93 : x
  2. Step 2: Convert to fraction form
    438,609.07/605,380.50 = 285,376.93/x
  3. Step 3: Cross multiply
    438,609.07x = 605,380.50 × 285,376.93
  4. Step 4: Simplify right side
    438,609.07x = 172,761,628,571.87
  5. Step 5: Solve for x
    x = 172,761,628,571.87/438,609.07
  6. Step 6: Final answer
    x = 393,885.22

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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.