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Finding the Fourth Proportional to 1,319,261.80, 1,978,028.70 and 520,061.80

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Solution

The fourth proportional to 1,319,261.80, 1,978,028.70 and 520,061.80 is: 779,752.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,261.80 : 1,978,028.70 = 520,061.80 : x
  2. Step 2: Convert to fraction form
    1,319,261.80/1,978,028.70 = 520,061.80/x
  3. Step 3: Cross multiply
    1,319,261.80x = 1,978,028.70 × 520,061.80
  4. Step 4: Simplify right side
    1,319,261.80x = 1,028,697,166,173.66
  5. Step 5: Solve for x
    x = 1,028,697,166,173.66/1,319,261.80
  6. Step 6: Final answer
    x = 779,752.11

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.