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Finding the Fourth Proportional to 421,987.50, 582,614.34 and 376,587.45

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Solution

The fourth proportional to 421,987.50, 582,614.34 and 376,587.45 is: 519,933.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,987.50 : 582,614.34 = 376,587.45 : x
  2. Step 2: Convert to fraction form
    421,987.50/582,614.34 = 376,587.45/x
  3. Step 3: Cross multiply
    421,987.50x = 582,614.34 × 376,587.45
  4. Step 4: Simplify right side
    421,987.50x = 219,405,248,634.03
  5. Step 5: Solve for x
    x = 219,405,248,634.03/421,987.50
  6. Step 6: Final answer
    x = 519,933.05

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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.