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Finding the Fourth Proportional to 572,181.36, 789,427.80 and 330,432

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Solution

The fourth proportional to 572,181.36, 789,427.80 and 330,432 is: 455,890.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,181.36 : 789,427.80 = 330,432 : x
  2. Step 2: Convert to fraction form
    572,181.36/789,427.80 = 330,432/x
  3. Step 3: Cross multiply
    572,181.36x = 789,427.80 × 330,432
  4. Step 4: Simplify right side
    572,181.36x = 260,852,206,809.60
  5. Step 5: Solve for x
    x = 260,852,206,809.60/572,181.36
  6. Step 6: Final answer
    x = 455,890.78

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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.