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Finding the Fourth Proportional to 388,542.96, 583,211.96 and 320,859.40

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Solution

The fourth proportional to 388,542.96, 583,211.96 and 320,859.40 is: 481,617.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,542.96 : 583,211.96 = 320,859.40 : x
  2. Step 2: Convert to fraction form
    388,542.96/583,211.96 = 320,859.40/x
  3. Step 3: Cross multiply
    388,542.96x = 583,211.96 × 320,859.40
  4. Step 4: Simplify right side
    388,542.96x = 187,129,039,558.42
  5. Step 5: Solve for x
    x = 187,129,039,558.42/388,542.96
  6. Step 6: Final answer
    x = 481,617.37

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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.