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Finding the Fourth Proportional to 896,695.80, 1,345,043.70 and 391,498.80

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Solution

The fourth proportional to 896,695.80, 1,345,043.70 and 391,498.80 is: 587,248.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    896,695.80 : 1,345,043.70 = 391,498.80 : x
  2. Step 2: Convert to fraction form
    896,695.80/1,345,043.70 = 391,498.80/x
  3. Step 3: Cross multiply
    896,695.80x = 1,345,043.70 × 391,498.80
  4. Step 4: Simplify right side
    896,695.80x = 526,582,994,497.56
  5. Step 5: Solve for x
    x = 526,582,994,497.56/896,695.80
  6. Step 6: Final answer
    x = 587,248.20

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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.