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Finding the Fourth Proportional to 572,187.36, 789,435.90 and 330,438

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Solution

The fourth proportional to 572,187.36, 789,435.90 and 330,438 is: 455,898.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,187.36 : 789,435.90 = 330,438 : x
  2. Step 2: Convert to fraction form
    572,187.36/789,435.90 = 330,438/x
  3. Step 3: Cross multiply
    572,187.36x = 789,435.90 × 330,438
  4. Step 4: Simplify right side
    572,187.36x = 260,859,619,924.20
  5. Step 5: Solve for x
    x = 260,859,619,924.20/572,187.36
  6. Step 6: Final answer
    x = 455,898.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.