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Finding the Fourth Proportional to 646,130.40, 969,195.60 and 447,064.80

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Solution

The fourth proportional to 646,130.40, 969,195.60 and 447,064.80 is: 670,597.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,130.40 : 969,195.60 = 447,064.80 : x
  2. Step 2: Convert to fraction form
    646,130.40/969,195.60 = 447,064.80/x
  3. Step 3: Cross multiply
    646,130.40x = 969,195.60 × 447,064.80
  4. Step 4: Simplify right side
    646,130.40x = 433,293,237,074.88
  5. Step 5: Solve for x
    x = 433,293,237,074.88/646,130.40
  6. Step 6: Final answer
    x = 670,597.20

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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.