Home / 912,721.78-1,368,791.53-313,538.46

Finding the Fourth Proportional to 912,721.78, 1,368,791.53 and 313,538.46

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Solution

The fourth proportional to 912,721.78, 1,368,791.53 and 313,538.46 is: 470,207.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,721.78 : 1,368,791.53 = 313,538.46 : x
  2. Step 2: Convert to fraction form
    912,721.78/1,368,791.53 = 313,538.46/x
  3. Step 3: Cross multiply
    912,721.78x = 1,368,791.53 × 313,538.46
  4. Step 4: Simplify right side
    912,721.78x = 429,168,782,460.43
  5. Step 5: Solve for x
    x = 429,168,782,460.43/912,721.78
  6. Step 6: Final answer
    x = 470,207.67

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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.