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Finding the Fourth Proportional to 809,748.40, 1,214,622.60 and 748,922.80

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Solution

The fourth proportional to 809,748.40, 1,214,622.60 and 748,922.80 is: 1,123,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,748.40 : 1,214,622.60 = 748,922.80 : x
  2. Step 2: Convert to fraction form
    809,748.40/1,214,622.60 = 748,922.80/x
  3. Step 3: Cross multiply
    809,748.40x = 1,214,622.60 × 748,922.80
  4. Step 4: Simplify right side
    809,748.40x = 909,658,558,535.28
  5. Step 5: Solve for x
    x = 909,658,558,535.28/809,748.40
  6. Step 6: Final answer
    x = 1,123,384.20

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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.