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Finding the Fourth Proportional to 626,680.80, 940,021.20 and 389,901.60

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Solution

The fourth proportional to 626,680.80, 940,021.20 and 389,901.60 is: 584,852.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,680.80 : 940,021.20 = 389,901.60 : x
  2. Step 2: Convert to fraction form
    626,680.80/940,021.20 = 389,901.60/x
  3. Step 3: Cross multiply
    626,680.80x = 940,021.20 × 389,901.60
  4. Step 4: Simplify right side
    626,680.80x = 366,515,769,913.92
  5. Step 5: Solve for x
    x = 366,515,769,913.92/626,680.80
  6. Step 6: Final answer
    x = 584,852.40

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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.