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Finding the Fourth Proportional to 325,699.32, 488,490.42 and 115,338.36

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Solution

The fourth proportional to 325,699.32, 488,490.42 and 115,338.36 is: 172,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,699.32 : 488,490.42 = 115,338.36 : x
  2. Step 2: Convert to fraction form
    325,699.32/488,490.42 = 115,338.36/x
  3. Step 3: Cross multiply
    325,699.32x = 488,490.42 × 115,338.36
  4. Step 4: Simplify right side
    325,699.32x = 56,341,683,918.51
  5. Step 5: Solve for x
    x = 56,341,683,918.51/325,699.32
  6. Step 6: Final answer
    x = 172,986.80

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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.