Home / 858,087.86-1,287,090.18-318,449.33

Finding the Fourth Proportional to 858,087.86, 1,287,090.18 and 318,449.33

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Solution

The fourth proportional to 858,087.86, 1,287,090.18 and 318,449.33 is: 477,658.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,087.86 : 1,287,090.18 = 318,449.33 : x
  2. Step 2: Convert to fraction form
    858,087.86/1,287,090.18 = 318,449.33/x
  3. Step 3: Cross multiply
    858,087.86x = 1,287,090.18 × 318,449.33
  4. Step 4: Simplify right side
    858,087.86x = 409,873,008,688.31
  5. Step 5: Solve for x
    x = 409,873,008,688.31/858,087.86
  6. Step 6: Final answer
    x = 477,658.56

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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.