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Finding the Fourth Proportional to 280,704.40, 421,060.20 and 93,715.90

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Solution

The fourth proportional to 280,704.40, 421,060.20 and 93,715.90 is: 140,575.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,704.40 : 421,060.20 = 93,715.90 : x
  2. Step 2: Convert to fraction form
    280,704.40/421,060.20 = 93,715.90/x
  3. Step 3: Cross multiply
    280,704.40x = 421,060.20 × 93,715.90
  4. Step 4: Simplify right side
    280,704.40x = 39,460,035,597.18
  5. Step 5: Solve for x
    x = 39,460,035,597.18/280,704.40
  6. Step 6: Final answer
    x = 140,575.05

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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.