Home / 1,319,235.40-1,978,261.80-520,105.60

Finding the Fourth Proportional to 1,319,235.40, 1,978,261.80 and 520,105.60

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Solution

The fourth proportional to 1,319,235.40, 1,978,261.80 and 520,105.60 is: 779,925.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,235.40 : 1,978,261.80 = 520,105.60 : x
  2. Step 2: Convert to fraction form
    1,319,235.40/1,978,261.80 = 520,105.60/x
  3. Step 3: Cross multiply
    1,319,235.40x = 1,978,261.80 × 520,105.60
  4. Step 4: Simplify right side
    1,319,235.40x = 1,028,905,040,446.08
  5. Step 5: Solve for x
    x = 1,028,905,040,446.08/1,319,235.40
  6. Step 6: Final answer
    x = 779,925.28

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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.