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Finding the Fourth Proportional to 603,728.51, 905,840.55 and 319,343.04

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Solution

The fourth proportional to 603,728.51, 905,840.55 and 319,343.04 is: 479,145.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,728.51 : 905,840.55 = 319,343.04 : x
  2. Step 2: Convert to fraction form
    603,728.51/905,840.55 = 319,343.04/x
  3. Step 3: Cross multiply
    603,728.51x = 905,840.55 × 319,343.04
  4. Step 4: Simplify right side
    603,728.51x = 289,273,874,992.27
  5. Step 5: Solve for x
    x = 289,273,874,992.27/603,728.51
  6. Step 6: Final answer
    x = 479,145.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.