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Finding the Fourth Proportional to 280,705.40, 421,061.70 and 93,716.90

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Solution

The fourth proportional to 280,705.40, 421,061.70 and 93,716.90 is: 140,576.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,705.40 : 421,061.70 = 93,716.90 : x
  2. Step 2: Convert to fraction form
    280,705.40/421,061.70 = 93,716.90/x
  3. Step 3: Cross multiply
    280,705.40x = 421,061.70 × 93,716.90
  4. Step 4: Simplify right side
    280,705.40x = 39,460,597,232.73
  5. Step 5: Solve for x
    x = 39,460,597,232.73/280,705.40
  6. Step 6: Final answer
    x = 140,576.55

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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.