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Finding the Fourth Proportional to 578,640.80, 868,090.80 and 223,623.20

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Solution

The fourth proportional to 578,640.80, 868,090.80 and 223,623.20 is: 335,484.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,640.80 : 868,090.80 = 223,623.20 : x
  2. Step 2: Convert to fraction form
    578,640.80/868,090.80 = 223,623.20/x
  3. Step 3: Cross multiply
    578,640.80x = 868,090.80 × 223,623.20
  4. Step 4: Simplify right side
    578,640.80x = 194,125,242,586.56
  5. Step 5: Solve for x
    x = 194,125,242,586.56/578,640.80
  6. Step 6: Final answer
    x = 335,484.89

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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.