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Finding the Fourth Proportional to 280,423.60, 421,072.80 and 162,325.60

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Solution

The fourth proportional to 280,423.60, 421,072.80 and 162,325.60 is: 243,741.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,423.60 : 421,072.80 = 162,325.60 : x
  2. Step 2: Convert to fraction form
    280,423.60/421,072.80 = 162,325.60/x
  3. Step 3: Cross multiply
    280,423.60x = 421,072.80 × 162,325.60
  4. Step 4: Simplify right side
    280,423.60x = 68,350,894,903.68
  5. Step 5: Solve for x
    x = 68,350,894,903.68/280,423.60
  6. Step 6: Final answer
    x = 243,741.59

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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.