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Finding the Fourth Proportional to 421,841.21, 582,412.56 and 376,441.12

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Solution

The fourth proportional to 421,841.21, 582,412.56 and 376,441.12 is: 519,731.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,841.21 : 582,412.56 = 376,441.12 : x
  2. Step 2: Convert to fraction form
    421,841.21/582,412.56 = 376,441.12/x
  3. Step 3: Cross multiply
    421,841.21x = 582,412.56 × 376,441.12
  4. Step 4: Simplify right side
    421,841.21x = 219,244,033,476.40
  5. Step 5: Solve for x
    x = 219,244,033,476.40/421,841.21
  6. Step 6: Final answer
    x = 519,731.19

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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.