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Finding the Fourth Proportional to 402,593.83, 555,586.38 and 221,313.40

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Solution

The fourth proportional to 402,593.83, 555,586.38 and 221,313.40 is: 305,416.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,593.83 : 555,586.38 = 221,313.40 : x
  2. Step 2: Convert to fraction form
    402,593.83/555,586.38 = 221,313.40/x
  3. Step 3: Cross multiply
    402,593.83x = 555,586.38 × 221,313.40
  4. Step 4: Simplify right side
    402,593.83x = 122,958,707,973.56
  5. Step 5: Solve for x
    x = 122,958,707,973.56/402,593.83
  6. Step 6: Final answer
    x = 305,416.28

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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.