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Finding the Fourth Proportional to 434,343.87, 648,544.93 and 389,072.97

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Solution

The fourth proportional to 434,343.87, 648,544.93 and 389,072.97 is: 580,948.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,343.87 : 648,544.93 = 389,072.97 : x
  2. Step 2: Convert to fraction form
    434,343.87/648,544.93 = 389,072.97/x
  3. Step 3: Cross multiply
    434,343.87x = 648,544.93 × 389,072.97
  4. Step 4: Simplify right side
    434,343.87x = 252,331,301,120.86
  5. Step 5: Solve for x
    x = 252,331,301,120.86/434,343.87
  6. Step 6: Final answer
    x = 580,948.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.