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Finding the Fourth Proportional to 505,860.43, 757,430.97 and 385,343.32

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Solution

The fourth proportional to 505,860.43, 757,430.97 and 385,343.32 is: 576,979.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,860.43 : 757,430.97 = 385,343.32 : x
  2. Step 2: Convert to fraction form
    505,860.43/757,430.97 = 385,343.32/x
  3. Step 3: Cross multiply
    505,860.43x = 757,430.97 × 385,343.32
  4. Step 4: Simplify right side
    505,860.43x = 291,870,964,650.62
  5. Step 5: Solve for x
    x = 291,870,964,650.62/505,860.43
  6. Step 6: Final answer
    x = 576,979.24

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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.