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Finding the Fourth Proportional to 1,318,893.90, 1,978,303.77 and 420,389.52

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Solution

The fourth proportional to 1,318,893.90, 1,978,303.77 and 420,389.52 is: 630,572.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,893.90 : 1,978,303.77 = 420,389.52 : x
  2. Step 2: Convert to fraction form
    1,318,893.90/1,978,303.77 = 420,389.52/x
  3. Step 3: Cross multiply
    1,318,893.90x = 1,978,303.77 × 420,389.52
  4. Step 4: Simplify right side
    1,318,893.90x = 831,658,172,284.49
  5. Step 5: Solve for x
    x = 831,658,172,284.49/1,318,893.90
  6. Step 6: Final answer
    x = 630,572.46

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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.