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Finding the Fourth Proportional to 628,981.70, 943,472.55 and 419,029.70

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Solution

The fourth proportional to 628,981.70, 943,472.55 and 419,029.70 is: 628,544.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,981.70 : 943,472.55 = 419,029.70 : x
  2. Step 2: Convert to fraction form
    628,981.70/943,472.55 = 419,029.70/x
  3. Step 3: Cross multiply
    628,981.70x = 943,472.55 × 419,029.70
  4. Step 4: Simplify right side
    628,981.70x = 395,343,019,584.74
  5. Step 5: Solve for x
    x = 395,343,019,584.74/628,981.70
  6. Step 6: Final answer
    x = 628,544.55

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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.