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Finding the Fourth Proportional to 207,759.80, 311,639.70 and 172,330.40

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Solution

The fourth proportional to 207,759.80, 311,639.70 and 172,330.40 is: 258,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,759.80 : 311,639.70 = 172,330.40 : x
  2. Step 2: Convert to fraction form
    207,759.80/311,639.70 = 172,330.40/x
  3. Step 3: Cross multiply
    207,759.80x = 311,639.70 × 172,330.40
  4. Step 4: Simplify right side
    207,759.80x = 53,704,994,156.88
  5. Step 5: Solve for x
    x = 53,704,994,156.88/207,759.80
  6. Step 6: Final answer
    x = 258,495.60

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1.5x scale

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.