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Finding the Fourth Proportional to 311,265.80, 429,422.06 and 190,196.90

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Solution

The fourth proportional to 311,265.80, 429,422.06 and 190,196.90 is: 262,395.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,265.80 : 429,422.06 = 190,196.90 : x
  2. Step 2: Convert to fraction form
    311,265.80/429,422.06 = 190,196.90/x
  3. Step 3: Cross multiply
    311,265.80x = 429,422.06 × 190,196.90
  4. Step 4: Simplify right side
    311,265.80x = 81,674,744,072.19
  5. Step 5: Solve for x
    x = 81,674,744,072.19/311,265.80
  6. Step 6: Final answer
    x = 262,395.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.