Home / 919,234.76-1,378,852.55-288,197.78

Finding the Fourth Proportional to 919,234.76, 1,378,852.55 and 288,197.78

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Solution

The fourth proportional to 919,234.76, 1,378,852.55 and 288,197.78 is: 432,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,234.76 : 1,378,852.55 = 288,197.78 : x
  2. Step 2: Convert to fraction form
    919,234.76/1,378,852.55 = 288,197.78/x
  3. Step 3: Cross multiply
    919,234.76x = 1,378,852.55 × 288,197.78
  4. Step 4: Simplify right side
    919,234.76x = 397,382,243,857.34
  5. Step 5: Solve for x
    x = 397,382,243,857.34/919,234.76
  6. Step 6: Final answer
    x = 432,296.80

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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.