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Finding the Fourth Proportional to 472,987.20, 709,480.80 and 444,993.60

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Solution

The fourth proportional to 472,987.20, 709,480.80 and 444,993.60 is: 667,490.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,987.20 : 709,480.80 = 444,993.60 : x
  2. Step 2: Convert to fraction form
    472,987.20/709,480.80 = 444,993.60/x
  3. Step 3: Cross multiply
    472,987.20x = 709,480.80 × 444,993.60
  4. Step 4: Simplify right side
    472,987.20x = 315,714,415,322.88
  5. Step 5: Solve for x
    x = 315,714,415,322.88/472,987.20
  6. Step 6: Final answer
    x = 667,490.40

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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.