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Finding the Fourth Proportional to 644,102.80, 966,154.20 and 407,712.40

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Solution

The fourth proportional to 644,102.80, 966,154.20 and 407,712.40 is: 611,568.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,102.80 : 966,154.20 = 407,712.40 : x
  2. Step 2: Convert to fraction form
    644,102.80/966,154.20 = 407,712.40/x
  3. Step 3: Cross multiply
    644,102.80x = 966,154.20 × 407,712.40
  4. Step 4: Simplify right side
    644,102.80x = 393,913,047,652.08
  5. Step 5: Solve for x
    x = 393,913,047,652.08/644,102.80
  6. Step 6: Final answer
    x = 611,568.60

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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.