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Finding the Fourth Proportional to 548,720.40, 757,190.96 and 306,984

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Solution

The fourth proportional to 548,720.40, 757,190.96 and 306,984 is: 423,613.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,720.40 : 757,190.96 = 306,984 : x
  2. Step 2: Convert to fraction form
    548,720.40/757,190.96 = 306,984/x
  3. Step 3: Cross multiply
    548,720.40x = 757,190.96 × 306,984
  4. Step 4: Simplify right side
    548,720.40x = 232,445,509,664.64
  5. Step 5: Solve for x
    x = 232,445,509,664.64/548,720.40
  6. Step 6: Final answer
    x = 423,613.76

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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.