Home / 815,749.07-1,223,798.70-342,161.51

Finding the Fourth Proportional to 815,749.07, 1,223,798.70 and 342,161.51

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Solution

The fourth proportional to 815,749.07, 1,223,798.70 and 342,161.51 is: 513,315.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,749.07 : 1,223,798.70 = 342,161.51 : x
  2. Step 2: Convert to fraction form
    815,749.07/1,223,798.70 = 342,161.51/x
  3. Step 3: Cross multiply
    815,749.07x = 1,223,798.70 × 342,161.51
  4. Step 4: Simplify right side
    815,749.07x = 418,736,811,128.04
  5. Step 5: Solve for x
    x = 418,736,811,128.04/815,749.07
  6. Step 6: Final answer
    x = 513,315.71

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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.