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Finding the Fourth Proportional to 911,186.10, 1,366,779.15 and 405,746.10

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Solution

The fourth proportional to 911,186.10, 1,366,779.15 and 405,746.10 is: 608,619.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,186.10 : 1,366,779.15 = 405,746.10 : x
  2. Step 2: Convert to fraction form
    911,186.10/1,366,779.15 = 405,746.10/x
  3. Step 3: Cross multiply
    911,186.10x = 1,366,779.15 × 405,746.10
  4. Step 4: Simplify right side
    911,186.10x = 554,565,309,673.82
  5. Step 5: Solve for x
    x = 554,565,309,673.82/911,186.10
  6. Step 6: Final answer
    x = 608,619.15

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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.