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Finding the Fourth Proportional to 621,138.40, 931,706.88 and 194,677.12

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Solution

The fourth proportional to 621,138.40, 931,706.88 and 194,677.12 is: 292,015.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,138.40 : 931,706.88 = 194,677.12 : x
  2. Step 2: Convert to fraction form
    621,138.40/931,706.88 = 194,677.12/x
  3. Step 3: Cross multiply
    621,138.40x = 931,706.88 × 194,677.12
  4. Step 4: Simplify right side
    621,138.40x = 181,382,012,082.59
  5. Step 5: Solve for x
    x = 181,382,012,082.59/621,138.40
  6. Step 6: Final answer
    x = 292,015.45

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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.