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Finding the Fourth Proportional to 289,811.40, 434,793.90 and 102,803.40

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Solution

The fourth proportional to 289,811.40, 434,793.90 and 102,803.40 is: 154,232.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,811.40 : 434,793.90 = 102,803.40 : x
  2. Step 2: Convert to fraction form
    289,811.40/434,793.90 = 102,803.40/x
  3. Step 3: Cross multiply
    289,811.40x = 434,793.90 × 102,803.40
  4. Step 4: Simplify right side
    289,811.40x = 44,698,291,219.26
  5. Step 5: Solve for x
    x = 44,698,291,219.26/289,811.40
  6. Step 6: Final answer
    x = 154,232.34

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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.