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Finding the Fourth Proportional to 665,946.30, 998,919.45 and 291,969.30

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Solution

The fourth proportional to 665,946.30, 998,919.45 and 291,969.30 is: 437,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,946.30 : 998,919.45 = 291,969.30 : x
  2. Step 2: Convert to fraction form
    665,946.30/998,919.45 = 291,969.30/x
  3. Step 3: Cross multiply
    665,946.30x = 998,919.45 × 291,969.30
  4. Step 4: Simplify right side
    665,946.30x = 291,653,812,572.89
  5. Step 5: Solve for x
    x = 291,653,812,572.89/665,946.30
  6. Step 6: Final answer
    x = 437,953.95

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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.