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Finding the Fourth Proportional to 388,543.96, 583,213.46 and 320,860.40

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Solution

The fourth proportional to 388,543.96, 583,213.46 and 320,860.40 is: 481,618.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,543.96 : 583,213.46 = 320,860.40 : x
  2. Step 2: Convert to fraction form
    388,543.96/583,213.46 = 320,860.40/x
  3. Step 3: Cross multiply
    388,543.96x = 583,213.46 × 320,860.40
  4. Step 4: Simplify right side
    388,543.96x = 187,130,104,060.98
  5. Step 5: Solve for x
    x = 187,130,104,060.98/388,543.96
  6. Step 6: Final answer
    x = 481,618.87

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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.