Home / 621,724.32-857,979.57-353,452.32

Finding the Fourth Proportional to 621,724.32, 857,979.57 and 353,452.32

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Solution

The fourth proportional to 621,724.32, 857,979.57 and 353,452.32 is: 487,764.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,724.32 : 857,979.57 = 353,452.32 : x
  2. Step 2: Convert to fraction form
    621,724.32/857,979.57 = 353,452.32/x
  3. Step 3: Cross multiply
    621,724.32x = 857,979.57 × 353,452.32
  4. Step 4: Simplify right side
    621,724.32x = 303,254,869,529.10
  5. Step 5: Solve for x
    x = 303,254,869,529.10/621,724.32
  6. Step 6: Final answer
    x = 487,764.21

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.