Home / 428,328.20-642,492.30-303,912.20

Finding the Fourth Proportional to 428,328.20, 642,492.30 and 303,912.20

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Solution

The fourth proportional to 428,328.20, 642,492.30 and 303,912.20 is: 455,868.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,328.20 : 642,492.30 = 303,912.20 : x
  2. Step 2: Convert to fraction form
    428,328.20/642,492.30 = 303,912.20/x
  3. Step 3: Cross multiply
    428,328.20x = 642,492.30 × 303,912.20
  4. Step 4: Simplify right side
    428,328.20x = 195,261,248,376.06
  5. Step 5: Solve for x
    x = 195,261,248,376.06/428,328.20
  6. Step 6: Final answer
    x = 455,868.30

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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.