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Finding the Fourth Proportional to 280,718.40, 421,077.60 and 162,328.80

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Solution

The fourth proportional to 280,718.40, 421,077.60 and 162,328.80 is: 243,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,718.40 : 421,077.60 = 162,328.80 : x
  2. Step 2: Convert to fraction form
    280,718.40/421,077.60 = 162,328.80/x
  3. Step 3: Cross multiply
    280,718.40x = 421,077.60 × 162,328.80
  4. Step 4: Simplify right side
    280,718.40x = 68,353,021,514.88
  5. Step 5: Solve for x
    x = 68,353,021,514.88/280,718.40
  6. Step 6: Final answer
    x = 243,493.20

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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.