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Finding the Fourth Proportional to 362,137.80, 543,206.70 and 355,139.40

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Solution

The fourth proportional to 362,137.80, 543,206.70 and 355,139.40 is: 532,709.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,137.80 : 543,206.70 = 355,139.40 : x
  2. Step 2: Convert to fraction form
    362,137.80/543,206.70 = 355,139.40/x
  3. Step 3: Cross multiply
    362,137.80x = 543,206.70 × 355,139.40
  4. Step 4: Simplify right side
    362,137.80x = 192,914,101,513.98
  5. Step 5: Solve for x
    x = 192,914,101,513.98/362,137.80
  6. Step 6: Final answer
    x = 532,709.10

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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.