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Finding the Fourth Proportional to 620,991.39, 931,487.10 and 200,267.28

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Solution

The fourth proportional to 620,991.39, 931,487.10 and 200,267.28 is: 300,400.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,991.39 : 931,487.10 = 200,267.28 : x
  2. Step 2: Convert to fraction form
    620,991.39/931,487.10 = 200,267.28/x
  3. Step 3: Cross multiply
    620,991.39x = 931,487.10 × 200,267.28
  4. Step 4: Simplify right side
    620,991.39x = 186,546,387,872.09
  5. Step 5: Solve for x
    x = 186,546,387,872.09/620,991.39
  6. Step 6: Final answer
    x = 300,400.92

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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.