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Finding the Fourth Proportional to 663,390, 995,085 and 220,158

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Solution

The fourth proportional to 663,390, 995,085 and 220,158 is: 330,237

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,390 : 995,085 = 220,158 : x
  2. Step 2: Convert to fraction form
    663,390/995,085 = 220,158/x
  3. Step 3: Cross multiply
    663,390x = 995,085 × 220,158
  4. Step 4: Simplify right side
    663,390x = 219,075,923,430
  5. Step 5: Solve for x
    x = 219,075,923,430/663,390
  6. Step 6: Final answer
    x = 330,237

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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.