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Finding the Fourth Proportional to 438,804.80, 605,402.88 and 285,773.12

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Solution

The fourth proportional to 438,804.80, 605,402.88 and 285,773.12 is: 394,270.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,804.80 : 605,402.88 = 285,773.12 : x
  2. Step 2: Convert to fraction form
    438,804.80/605,402.88 = 285,773.12/x
  3. Step 3: Cross multiply
    438,804.80x = 605,402.88 × 285,773.12
  4. Step 4: Simplify right side
    438,804.80x = 173,007,869,874.59
  5. Step 5: Solve for x
    x = 173,007,869,874.59/438,804.80
  6. Step 6: Final answer
    x = 394,270.69

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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.