Home / 815,858.79-1,223,442.09-388,900.68

Finding the Fourth Proportional to 815,858.79, 1,223,442.09 and 388,900.68

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Solution

The fourth proportional to 815,858.79, 1,223,442.09 and 388,900.68 is: 583,186.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,858.79 : 1,223,442.09 = 388,900.68 : x
  2. Step 2: Convert to fraction form
    815,858.79/1,223,442.09 = 388,900.68/x
  3. Step 3: Cross multiply
    815,858.79x = 1,223,442.09 × 388,900.68
  4. Step 4: Simplify right side
    815,858.79x = 475,797,460,741.62
  5. Step 5: Solve for x
    x = 475,797,460,741.62/815,858.79
  6. Step 6: Final answer
    x = 583,186.04

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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.