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Finding the Fourth Proportional to 403,897.80, 605,846.70 and 269,178.60

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Solution

The fourth proportional to 403,897.80, 605,846.70 and 269,178.60 is: 403,767.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,897.80 : 605,846.70 = 269,178.60 : x
  2. Step 2: Convert to fraction form
    403,897.80/605,846.70 = 269,178.60/x
  3. Step 3: Cross multiply
    403,897.80x = 605,846.70 × 269,178.60
  4. Step 4: Simplify right side
    403,897.80x = 163,080,966,520.62
  5. Step 5: Solve for x
    x = 163,080,966,520.62/403,897.80
  6. Step 6: Final answer
    x = 403,767.90

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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.