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Finding the Fourth Proportional to 289,919.40, 434,879.10 and 171,529.80

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Solution

The fourth proportional to 289,919.40, 434,879.10 and 171,529.80 is: 257,294.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,919.40 : 434,879.10 = 171,529.80 : x
  2. Step 2: Convert to fraction form
    289,919.40/434,879.10 = 171,529.80/x
  3. Step 3: Cross multiply
    289,919.40x = 434,879.10 × 171,529.80
  4. Step 4: Simplify right side
    289,919.40x = 74,594,725,047.18
  5. Step 5: Solve for x
    x = 74,594,725,047.18/289,919.40
  6. Step 6: Final answer
    x = 257,294.70

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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.