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Finding the Fourth Proportional to 660,863.40, 991,295.10 and 626,746.20

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Solution

The fourth proportional to 660,863.40, 991,295.10 and 626,746.20 is: 940,119.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,863.40 : 991,295.10 = 626,746.20 : x
  2. Step 2: Convert to fraction form
    660,863.40/991,295.10 = 626,746.20/x
  3. Step 3: Cross multiply
    660,863.40x = 991,295.10 × 626,746.20
  4. Step 4: Simplify right side
    660,863.40x = 621,290,437,003.62
  5. Step 5: Solve for x
    x = 621,290,437,003.62/660,863.40
  6. Step 6: Final answer
    x = 940,119.30

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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.