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Finding the Fourth Proportional to 718,520.64, 991,552.48 and 396,244.16

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Solution

The fourth proportional to 718,520.64, 991,552.48 and 396,244.16 is: 546,813.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,520.64 : 991,552.48 = 396,244.16 : x
  2. Step 2: Convert to fraction form
    718,520.64/991,552.48 = 396,244.16/x
  3. Step 3: Cross multiply
    718,520.64x = 991,552.48 × 396,244.16
  4. Step 4: Simplify right side
    718,520.64x = 392,896,879,533.52
  5. Step 5: Solve for x
    x = 392,896,879,533.52/718,520.64
  6. Step 6: Final answer
    x = 546,813.63

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.