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Finding the Fourth Proportional to 279,907.40, 419,861.10 and 92,918.90

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Solution

The fourth proportional to 279,907.40, 419,861.10 and 92,918.90 is: 139,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,907.40 : 419,861.10 = 92,918.90 : x
  2. Step 2: Convert to fraction form
    279,907.40/419,861.10 = 92,918.90/x
  3. Step 3: Cross multiply
    279,907.40x = 419,861.10 × 92,918.90
  4. Step 4: Simplify right side
    279,907.40x = 39,013,031,564.79
  5. Step 5: Solve for x
    x = 39,013,031,564.79/279,907.40
  6. Step 6: Final answer
    x = 139,378.35

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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.