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Finding the Fourth Proportional to 807,789.10, 1,128,692.90 and 807,789.10

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Solution

The fourth proportional to 807,789.10, 1,128,692.90 and 807,789.10 is: 1,128,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,789.10 : 1,128,692.90 = 807,789.10 : x
  2. Step 2: Convert to fraction form
    807,789.10/1,128,692.90 = 807,789.10/x
  3. Step 3: Cross multiply
    807,789.10x = 1,128,692.90 × 807,789.10
  4. Step 4: Simplify right side
    807,789.10x = 911,745,821,867.39
  5. Step 5: Solve for x
    x = 911,745,821,867.39/807,789.10
  6. Step 6: Final answer
    x = 1,128,692.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.