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Finding the Fourth Proportional to 289,730.80, 434,450.40 and 171,438.40

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Solution

The fourth proportional to 289,730.80, 434,450.40 and 171,438.40 is: 257,071.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,730.80 : 434,450.40 = 171,438.40 : x
  2. Step 2: Convert to fraction form
    289,730.80/434,450.40 = 171,438.40/x
  3. Step 3: Cross multiply
    289,730.80x = 434,450.40 × 171,438.40
  4. Step 4: Simplify right side
    289,730.80x = 74,481,481,455.36
  5. Step 5: Solve for x
    x = 74,481,481,455.36/289,730.80
  6. Step 6: Final answer
    x = 257,071.33

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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.