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Finding the Fourth Proportional to 620,164.80, 930,247.20 and 480,196.80

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Solution

The fourth proportional to 620,164.80, 930,247.20 and 480,196.80 is: 720,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,164.80 : 930,247.20 = 480,196.80 : x
  2. Step 2: Convert to fraction form
    620,164.80/930,247.20 = 480,196.80/x
  3. Step 3: Cross multiply
    620,164.80x = 930,247.20 × 480,196.80
  4. Step 4: Simplify right side
    620,164.80x = 446,701,728,648.96
  5. Step 5: Solve for x
    x = 446,701,728,648.96/620,164.80
  6. Step 6: Final answer
    x = 720,295.20

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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.