Home / 393,225.10-542,645.43-221,143.03

Finding the Fourth Proportional to 393,225.10, 542,645.43 and 221,143.03

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Solution

The fourth proportional to 393,225.10, 542,645.43 and 221,143.03 is: 305,174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,225.10 : 542,645.43 = 221,143.03 : x
  2. Step 2: Convert to fraction form
    393,225.10/542,645.43 = 221,143.03/x
  3. Step 3: Cross multiply
    393,225.10x = 542,645.43 × 221,143.03
  4. Step 4: Simplify right side
    393,225.10x = 120,002,252,419.95
  5. Step 5: Solve for x
    x = 120,002,252,419.95/393,225.10
  6. Step 6: Final answer
    x = 305,174.45

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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.