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Finding the Fourth Proportional to 638,199.40, 957,299.10 and 402,586.60

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Solution

The fourth proportional to 638,199.40, 957,299.10 and 402,586.60 is: 603,879.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,199.40 : 957,299.10 = 402,586.60 : x
  2. Step 2: Convert to fraction form
    638,199.40/957,299.10 = 402,586.60/x
  3. Step 3: Cross multiply
    638,199.40x = 957,299.10 × 402,586.60
  4. Step 4: Simplify right side
    638,199.40x = 385,395,789,852.06
  5. Step 5: Solve for x
    x = 385,395,789,852.06/638,199.40
  6. Step 6: Final answer
    x = 603,879.90

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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.