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Finding the Fourth Proportional to 399,751.21, 599,561.13 and 143,530.74

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Solution

The fourth proportional to 399,751.21, 599,561.13 and 143,530.74 is: 215,272.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,751.21 : 599,561.13 = 143,530.74 : x
  2. Step 2: Convert to fraction form
    399,751.21/599,561.13 = 143,530.74/x
  3. Step 3: Cross multiply
    399,751.21x = 599,561.13 × 143,530.74
  4. Step 4: Simplify right side
    399,751.21x = 86,055,453,202.38
  5. Step 5: Solve for x
    x = 86,055,453,202.38/399,751.21
  6. Step 6: Final answer
    x = 215,272.53

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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.