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Finding the Fourth Proportional to 820,533.80, 1,230,800.70 and 378,165.80

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Solution

The fourth proportional to 820,533.80, 1,230,800.70 and 378,165.80 is: 567,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,533.80 : 1,230,800.70 = 378,165.80 : x
  2. Step 2: Convert to fraction form
    820,533.80/1,230,800.70 = 378,165.80/x
  3. Step 3: Cross multiply
    820,533.80x = 1,230,800.70 × 378,165.80
  4. Step 4: Simplify right side
    820,533.80x = 465,446,731,356.06
  5. Step 5: Solve for x
    x = 465,446,731,356.06/820,533.80
  6. Step 6: Final answer
    x = 567,248.70

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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.