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Finding the Fourth Proportional to 878,798.58, 1,212,666.54 and 511,343.70

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Solution

The fourth proportional to 878,798.58, 1,212,666.54 and 511,343.70 is: 705,610.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,798.58 : 1,212,666.54 = 511,343.70 : x
  2. Step 2: Convert to fraction form
    878,798.58/1,212,666.54 = 511,343.70/x
  3. Step 3: Cross multiply
    878,798.58x = 1,212,666.54 × 511,343.70
  4. Step 4: Simplify right side
    878,798.58x = 620,089,395,429.80
  5. Step 5: Solve for x
    x = 620,089,395,429.80/878,798.58
  6. Step 6: Final answer
    x = 705,610.37

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Double scale
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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.