Home / 1,431,739.88-1,975,699.30-787,143.40

Finding the Fourth Proportional to 1,431,739.88, 1,975,699.30 and 787,143.40

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Solution

The fourth proportional to 1,431,739.88, 1,975,699.30 and 787,143.40 is: 1,086,201.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431,739.88 : 1,975,699.30 = 787,143.40 : x
  2. Step 2: Convert to fraction form
    1,431,739.88/1,975,699.30 = 787,143.40/x
  3. Step 3: Cross multiply
    1,431,739.88x = 1,975,699.30 × 787,143.40
  4. Step 4: Simplify right side
    1,431,739.88x = 1,555,158,664,379.62
  5. Step 5: Solve for x
    x = 1,555,158,664,379.62/1,431,739.88
  6. Step 6: Final answer
    x = 1,086,201.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.