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Finding the Fourth Proportional to 578,420.80, 867,760.80 and 223,403.20

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Solution

The fourth proportional to 578,420.80, 867,760.80 and 223,403.20 is: 335,154.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,420.80 : 867,760.80 = 223,403.20 : x
  2. Step 2: Convert to fraction form
    578,420.80/867,760.80 = 223,403.20/x
  3. Step 3: Cross multiply
    578,420.80x = 867,760.80 × 223,403.20
  4. Step 4: Simplify right side
    578,420.80x = 193,860,539,554.56
  5. Step 5: Solve for x
    x = 193,860,539,554.56/578,420.80
  6. Step 6: Final answer
    x = 335,154.86

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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.