Home / 1,319,056.56-1,978,728.30-420,287.04

Finding the Fourth Proportional to 1,319,056.56, 1,978,728.30 and 420,287.04

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Solution

The fourth proportional to 1,319,056.56, 1,978,728.30 and 420,287.04 is: 630,476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,056.56 : 1,978,728.30 = 420,287.04 : x
  2. Step 2: Convert to fraction form
    1,319,056.56/1,978,728.30 = 420,287.04/x
  3. Step 3: Cross multiply
    1,319,056.56x = 1,978,728.30 × 420,287.04
  4. Step 4: Simplify right side
    1,319,056.56x = 831,633,860,171.23
  5. Step 5: Solve for x
    x = 831,633,860,171.23/1,319,056.56
  6. Step 6: Final answer
    x = 630,476.27

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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.