Home / 1,318,829.16-1,978,222.26-420,258.76

Finding the Fourth Proportional to 1,318,829.16, 1,978,222.26 and 420,258.76

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Solution

The fourth proportional to 1,318,829.16, 1,978,222.26 and 420,258.76 is: 630,381.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,829.16 : 1,978,222.26 = 420,258.76 : x
  2. Step 2: Convert to fraction form
    1,318,829.16/1,978,222.26 = 420,258.76/x
  3. Step 3: Cross multiply
    1,318,829.16x = 1,978,222.26 × 420,258.76
  4. Step 4: Simplify right side
    1,318,829.16x = 831,365,233,992.00
  5. Step 5: Solve for x
    x = 831,365,233,992.00/1,318,829.16
  6. Step 6: Final answer
    x = 630,381.30

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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.