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Finding the Fourth Proportional to 455,613.40, 683,420.10 and 255,940.30

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Solution

The fourth proportional to 455,613.40, 683,420.10 and 255,940.30 is: 383,910.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,613.40 : 683,420.10 = 255,940.30 : x
  2. Step 2: Convert to fraction form
    455,613.40/683,420.10 = 255,940.30/x
  3. Step 3: Cross multiply
    455,613.40x = 683,420.10 × 255,940.30
  4. Step 4: Simplify right side
    455,613.40x = 174,914,745,420.03
  5. Step 5: Solve for x
    x = 174,914,745,420.03/455,613.40
  6. Step 6: Final answer
    x = 383,910.45

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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.