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Finding the Fourth Proportional to 386,267.80, 579,401.70 and 353,090.20

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Solution

The fourth proportional to 386,267.80, 579,401.70 and 353,090.20 is: 529,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,267.80 : 579,401.70 = 353,090.20 : x
  2. Step 2: Convert to fraction form
    386,267.80/579,401.70 = 353,090.20/x
  3. Step 3: Cross multiply
    386,267.80x = 579,401.70 × 353,090.20
  4. Step 4: Simplify right side
    386,267.80x = 204,581,062,133.34
  5. Step 5: Solve for x
    x = 204,581,062,133.34/386,267.80
  6. Step 6: Final answer
    x = 529,635.30

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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.