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Finding the Fourth Proportional to 808,461.80, 1,212,692.70 and 276,000.20

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Solution

The fourth proportional to 808,461.80, 1,212,692.70 and 276,000.20 is: 414,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,461.80 : 1,212,692.70 = 276,000.20 : x
  2. Step 2: Convert to fraction form
    808,461.80/1,212,692.70 = 276,000.20/x
  3. Step 3: Cross multiply
    808,461.80x = 1,212,692.70 × 276,000.20
  4. Step 4: Simplify right side
    808,461.80x = 334,703,427,738.54
  5. Step 5: Solve for x
    x = 334,703,427,738.54/808,461.80
  6. Step 6: Final answer
    x = 414,000.30

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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.