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Finding the Fourth Proportional to 930,300.40, 1,395,450.60 and 256,380.40

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Solution

The fourth proportional to 930,300.40, 1,395,450.60 and 256,380.40 is: 384,570.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    930,300.40 : 1,395,450.60 = 256,380.40 : x
  2. Step 2: Convert to fraction form
    930,300.40/1,395,450.60 = 256,380.40/x
  3. Step 3: Cross multiply
    930,300.40x = 1,395,450.60 × 256,380.40
  4. Step 4: Simplify right side
    930,300.40x = 357,766,183,008.24
  5. Step 5: Solve for x
    x = 357,766,183,008.24/930,300.40
  6. Step 6: Final answer
    x = 384,570.60

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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.