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Finding the Fourth Proportional to 618,570.98, 927,383.16 and 428,485.04

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Solution

The fourth proportional to 618,570.98, 927,383.16 and 428,485.04 is: 642,399.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,570.98 : 927,383.16 = 428,485.04 : x
  2. Step 2: Convert to fraction form
    618,570.98/927,383.16 = 428,485.04/x
  3. Step 3: Cross multiply
    618,570.98x = 927,383.16 × 428,485.04
  4. Step 4: Simplify right side
    618,570.98x = 397,369,810,407.93
  5. Step 5: Solve for x
    x = 397,369,810,407.93/618,570.98
  6. Step 6: Final answer
    x = 642,399.70

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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.