Home / 1,286,390.66-1,929,864.60-387,757.22

Finding the Fourth Proportional to 1,286,390.66, 1,929,864.60 and 387,757.22

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Solution

The fourth proportional to 1,286,390.66, 1,929,864.60 and 387,757.22 is: 581,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,390.66 : 1,929,864.60 = 387,757.22 : x
  2. Step 2: Convert to fraction form
    1,286,390.66/1,929,864.60 = 387,757.22/x
  3. Step 3: Cross multiply
    1,286,390.66x = 1,929,864.60 × 387,757.22
  4. Step 4: Simplify right side
    1,286,390.66x = 748,318,932,272.41
  5. Step 5: Solve for x
    x = 748,318,932,272.41/1,286,390.66
  6. Step 6: Final answer
    x = 581,719.81

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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.