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Finding the Fourth Proportional to 289,907.40, 434,861.10 and 124,019.40

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Solution

The fourth proportional to 289,907.40, 434,861.10 and 124,019.40 is: 186,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,907.40 : 434,861.10 = 124,019.40 : x
  2. Step 2: Convert to fraction form
    289,907.40/434,861.10 = 124,019.40/x
  3. Step 3: Cross multiply
    289,907.40x = 434,861.10 × 124,019.40
  4. Step 4: Simplify right side
    289,907.40x = 53,931,212,705.34
  5. Step 5: Solve for x
    x = 53,931,212,705.34/289,907.40
  6. Step 6: Final answer
    x = 186,029.10

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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.