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Finding the Fourth Proportional to 519,257.70, 778,886.55 and 447,987.30

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Solution

The fourth proportional to 519,257.70, 778,886.55 and 447,987.30 is: 671,980.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,257.70 : 778,886.55 = 447,987.30 : x
  2. Step 2: Convert to fraction form
    519,257.70/778,886.55 = 447,987.30/x
  3. Step 3: Cross multiply
    519,257.70x = 778,886.55 × 447,987.30
  4. Step 4: Simplify right side
    519,257.70x = 348,931,282,540.82
  5. Step 5: Solve for x
    x = 348,931,282,540.82/519,257.70
  6. Step 6: Final answer
    x = 671,980.95

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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.