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Finding the Fourth Proportional to 280,426.60, 421,077.30 and 162,328.60

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Solution

The fourth proportional to 280,426.60, 421,077.30 and 162,328.60 is: 243,746.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,426.60 : 421,077.30 = 162,328.60 : x
  2. Step 2: Convert to fraction form
    280,426.60/421,077.30 = 162,328.60/x
  3. Step 3: Cross multiply
    280,426.60x = 421,077.30 × 162,328.60
  4. Step 4: Simplify right side
    280,426.60x = 68,352,888,600.78
  5. Step 5: Solve for x
    x = 68,352,888,600.78/280,426.60
  6. Step 6: Final answer
    x = 243,746.09

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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.