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Finding the Fourth Proportional to 460,427.70, 690,641.55 and 439,760.55

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Solution

The fourth proportional to 460,427.70, 690,641.55 and 439,760.55 is: 659,640.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    460,427.70 : 690,641.55 = 439,760.55 : x
  2. Step 2: Convert to fraction form
    460,427.70/690,641.55 = 439,760.55/x
  3. Step 3: Cross multiply
    460,427.70x = 690,641.55 × 439,760.55
  4. Step 4: Simplify right side
    460,427.70x = 303,716,907,880.85
  5. Step 5: Solve for x
    x = 303,716,907,880.85/460,427.70
  6. Step 6: Final answer
    x = 659,640.83

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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.