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Finding the Fourth Proportional to 613,403.70, 920,105.55 and 313,784.70

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Solution

The fourth proportional to 613,403.70, 920,105.55 and 313,784.70 is: 470,677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,403.70 : 920,105.55 = 313,784.70 : x
  2. Step 2: Convert to fraction form
    613,403.70/920,105.55 = 313,784.70/x
  3. Step 3: Cross multiply
    613,403.70x = 920,105.55 × 313,784.70
  4. Step 4: Simplify right side
    613,403.70x = 288,715,043,975.09
  5. Step 5: Solve for x
    x = 288,715,043,975.09/613,403.70
  6. Step 6: Final answer
    x = 470,677.05

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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.