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Finding the Fourth Proportional to 820,645.60, 1,230,795.60 and 347,346.40

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Solution

The fourth proportional to 820,645.60, 1,230,795.60 and 347,346.40 is: 520,946.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,645.60 : 1,230,795.60 = 347,346.40 : x
  2. Step 2: Convert to fraction form
    820,645.60/1,230,795.60 = 347,346.40/x
  3. Step 3: Cross multiply
    820,645.60x = 1,230,795.60 × 347,346.40
  4. Step 4: Simplify right side
    820,645.60x = 427,512,420,795.84
  5. Step 5: Solve for x
    x = 427,512,420,795.84/820,645.60
  6. Step 6: Final answer
    x = 520,946.46

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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.