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Finding the Fourth Proportional to 286,046.20, 399,939.80 and 286,046.20

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Solution

The fourth proportional to 286,046.20, 399,939.80 and 286,046.20 is: 399,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,046.20 : 399,939.80 = 286,046.20 : x
  2. Step 2: Convert to fraction form
    286,046.20/399,939.80 = 286,046.20/x
  3. Step 3: Cross multiply
    286,046.20x = 399,939.80 × 286,046.20
  4. Step 4: Simplify right side
    286,046.20x = 114,401,260,018.76
  5. Step 5: Solve for x
    x = 114,401,260,018.76/286,046.20
  6. Step 6: Final answer
    x = 399,939.80

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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.