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Finding the Fourth Proportional to 545,832.80, 818,749.20 and 280,112.30

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Solution

The fourth proportional to 545,832.80, 818,749.20 and 280,112.30 is: 420,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,832.80 : 818,749.20 = 280,112.30 : x
  2. Step 2: Convert to fraction form
    545,832.80/818,749.20 = 280,112.30/x
  3. Step 3: Cross multiply
    545,832.80x = 818,749.20 × 280,112.30
  4. Step 4: Simplify right side
    545,832.80x = 229,341,721,535.16
  5. Step 5: Solve for x
    x = 229,341,721,535.16/545,832.80
  6. Step 6: Final answer
    x = 420,168.45

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Similar ratio
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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.