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Finding the Fourth Proportional to 999,768.34, 1,378,245 and 712,790.20

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Solution

The fourth proportional to 999,768.34, 1,378,245 and 712,790.20 is: 982,627.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,768.34 : 1,378,245 = 712,790.20 : x
  2. Step 2: Convert to fraction form
    999,768.34/1,378,245 = 712,790.20/x
  3. Step 3: Cross multiply
    999,768.34x = 1,378,245 × 712,790.20
  4. Step 4: Simplify right side
    999,768.34x = 982,399,529,199.00
  5. Step 5: Solve for x
    x = 982,399,529,199.00/999,768.34
  6. Step 6: Final answer
    x = 982,627.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.