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Finding the Fourth Proportional to 645,797.40, 968,696.10 and 505,675.80

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Solution

The fourth proportional to 645,797.40, 968,696.10 and 505,675.80 is: 758,513.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,797.40 : 968,696.10 = 505,675.80 : x
  2. Step 2: Convert to fraction form
    645,797.40/968,696.10 = 505,675.80/x
  3. Step 3: Cross multiply
    645,797.40x = 968,696.10 × 505,675.80
  4. Step 4: Simplify right side
    645,797.40x = 489,846,175,324.38
  5. Step 5: Solve for x
    x = 489,846,175,324.38/645,797.40
  6. Step 6: Final answer
    x = 758,513.70

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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.