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Finding the Fourth Proportional to 399,840.87, 599,866.46 and 143,699.32

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Solution

The fourth proportional to 399,840.87, 599,866.46 and 143,699.32 is: 215,586.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,840.87 : 599,866.46 = 143,699.32 : x
  2. Step 2: Convert to fraction form
    399,840.87/599,866.46 = 143,699.32/x
  3. Step 3: Cross multiply
    399,840.87x = 599,866.46 × 143,699.32
  4. Step 4: Simplify right side
    399,840.87x = 86,200,399,588.77
  5. Step 5: Solve for x
    x = 86,200,399,588.77/399,840.87
  6. Step 6: Final answer
    x = 215,586.76

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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.