Home / 898,429.21-1,239,941.03-511,338.75

Finding the Fourth Proportional to 898,429.21, 1,239,941.03 and 511,338.75

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Solution

The fourth proportional to 898,429.21, 1,239,941.03 and 511,338.75 is: 705,709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    898,429.21 : 1,239,941.03 = 511,338.75 : x
  2. Step 2: Convert to fraction form
    898,429.21/1,239,941.03 = 511,338.75/x
  3. Step 3: Cross multiply
    898,429.21x = 1,239,941.03 × 511,338.75
  4. Step 4: Simplify right side
    898,429.21x = 634,029,898,591.02
  5. Step 5: Solve for x
    x = 634,029,898,591.02/898,429.21
  6. Step 6: Final answer
    x = 705,709.35

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Double scale
Find fourth proportional to 898,430.21, 1,239,942.41 and 511,339.75
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.