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Finding the Fourth Proportional to 489,705.80, 734,558.70 and 340,406.60

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Solution

The fourth proportional to 489,705.80, 734,558.70 and 340,406.60 is: 510,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,705.80 : 734,558.70 = 340,406.60 : x
  2. Step 2: Convert to fraction form
    489,705.80/734,558.70 = 340,406.60/x
  3. Step 3: Cross multiply
    489,705.80x = 734,558.70 × 340,406.60
  4. Step 4: Simplify right side
    489,705.80x = 250,048,629,567.42
  5. Step 5: Solve for x
    x = 250,048,629,567.42/489,705.80
  6. Step 6: Final answer
    x = 510,609.90

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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.