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Finding the Fourth Proportional to 664,307.40, 996,461.10 and 439,921.20

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Solution

The fourth proportional to 664,307.40, 996,461.10 and 439,921.20 is: 659,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,307.40 : 996,461.10 = 439,921.20 : x
  2. Step 2: Convert to fraction form
    664,307.40/996,461.10 = 439,921.20/x
  3. Step 3: Cross multiply
    664,307.40x = 996,461.10 × 439,921.20
  4. Step 4: Simplify right side
    664,307.40x = 438,364,362,865.32
  5. Step 5: Solve for x
    x = 438,364,362,865.32/664,307.40
  6. Step 6: Final answer
    x = 659,881.80

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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.