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Finding the Fourth Proportional to 540,028.80, 810,043.20 and 398,311.20

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Solution

The fourth proportional to 540,028.80, 810,043.20 and 398,311.20 is: 597,466.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,028.80 : 810,043.20 = 398,311.20 : x
  2. Step 2: Convert to fraction form
    540,028.80/810,043.20 = 398,311.20/x
  3. Step 3: Cross multiply
    540,028.80x = 810,043.20 × 398,311.20
  4. Step 4: Simplify right side
    540,028.80x = 322,649,279,043.84
  5. Step 5: Solve for x
    x = 322,649,279,043.84/540,028.80
  6. Step 6: Final answer
    x = 597,466.80

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Double scale
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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.