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Finding the Fourth Proportional to 646,950.80, 970,717.80 and 309,861.20

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Solution

The fourth proportional to 646,950.80, 970,717.80 and 309,861.20 is: 464,931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,950.80 : 970,717.80 = 309,861.20 : x
  2. Step 2: Convert to fraction form
    646,950.80/970,717.80 = 309,861.20/x
  3. Step 3: Cross multiply
    646,950.80x = 970,717.80 × 309,861.20
  4. Step 4: Simplify right side
    646,950.80x = 300,787,782,369.36
  5. Step 5: Solve for x
    x = 300,787,782,369.36/646,950.80
  6. Step 6: Final answer
    x = 464,931.46

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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.