Home / 393,212.57-542,628.15-221,130.50

Finding the Fourth Proportional to 393,212.57, 542,628.15 and 221,130.50

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Solution

The fourth proportional to 393,212.57, 542,628.15 and 221,130.50 is: 305,157.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,212.57 : 542,628.15 = 221,130.50 : x
  2. Step 2: Convert to fraction form
    393,212.57/542,628.15 = 221,130.50/x
  3. Step 3: Cross multiply
    393,212.57x = 542,628.15 × 221,130.50
  4. Step 4: Simplify right side
    393,212.57x = 119,991,631,410.43
  5. Step 5: Solve for x
    x = 119,991,631,410.43/393,212.57
  6. Step 6: Final answer
    x = 305,157.16

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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.