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Finding the Fourth Proportional to 623,719.10, 935,578.65 and 576,479.90

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Solution

The fourth proportional to 623,719.10, 935,578.65 and 576,479.90 is: 864,719.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,719.10 : 935,578.65 = 576,479.90 : x
  2. Step 2: Convert to fraction form
    623,719.10/935,578.65 = 576,479.90/x
  3. Step 3: Cross multiply
    623,719.10x = 935,578.65 × 576,479.90
  4. Step 4: Simplify right side
    623,719.10x = 539,342,286,594.14
  5. Step 5: Solve for x
    x = 539,342,286,594.14/623,719.10
  6. Step 6: Final answer
    x = 864,719.85

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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.