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Finding the Fourth Proportional to 309,144.67, 428,802.28 and 300,950.71

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Solution

The fourth proportional to 309,144.67, 428,802.28 and 300,950.71 is: 417,436.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,144.67 : 428,802.28 = 300,950.71 : x
  2. Step 2: Convert to fraction form
    309,144.67/428,802.28 = 300,950.71/x
  3. Step 3: Cross multiply
    309,144.67x = 428,802.28 × 300,950.71
  4. Step 4: Simplify right side
    309,144.67x = 129,048,350,615.62
  5. Step 5: Solve for x
    x = 129,048,350,615.62/309,144.67
  6. Step 6: Final answer
    x = 417,436.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.