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Finding the Fourth Proportional to 665,696.40, 998,674.20 and 286,616.40

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Solution

The fourth proportional to 665,696.40, 998,674.20 and 286,616.40 is: 429,980.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,696.40 : 998,674.20 = 286,616.40 : x
  2. Step 2: Convert to fraction form
    665,696.40/998,674.20 = 286,616.40/x
  3. Step 3: Cross multiply
    665,696.40x = 998,674.20 × 286,616.40
  4. Step 4: Simplify right side
    665,696.40x = 286,236,403,976.88
  5. Step 5: Solve for x
    x = 286,236,403,976.88/665,696.40
  6. Step 6: Final answer
    x = 429,980.40

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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.