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Finding the Fourth Proportional to 693,211, 1,039,816.50 and 249,979

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Solution

The fourth proportional to 693,211, 1,039,816.50 and 249,979 is: 374,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,211 : 1,039,816.50 = 249,979 : x
  2. Step 2: Convert to fraction form
    693,211/1,039,816.50 = 249,979/x
  3. Step 3: Cross multiply
    693,211x = 1,039,816.50 × 249,979
  4. Step 4: Simplify right side
    693,211x = 259,932,288,853.50
  5. Step 5: Solve for x
    x = 259,932,288,853.50/693,211
  6. Step 6: Final answer
    x = 374,968.50

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Half scale
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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.