Home / 1,318,746.68-1,978,098.40-420,176.21

Finding the Fourth Proportional to 1,318,746.68, 1,978,098.40 and 420,176.21

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Solution

The fourth proportional to 1,318,746.68, 1,978,098.40 and 420,176.21 is: 630,257.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,746.68 : 1,978,098.40 = 420,176.21 : x
  2. Step 2: Convert to fraction form
    1,318,746.68/1,978,098.40 = 420,176.21/x
  3. Step 3: Cross multiply
    1,318,746.68x = 1,978,098.40 × 420,176.21
  4. Step 4: Simplify right side
    1,318,746.68x = 831,149,883,773.82
  5. Step 5: Solve for x
    x = 831,149,883,773.82/1,318,746.68
  6. Step 6: Final answer
    x = 630,257.42

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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.