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Finding the Fourth Proportional to 388,662.56, 536,347.92 and 218,896.16

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Solution

The fourth proportional to 388,662.56, 536,347.92 and 218,896.16 is: 302,073.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,662.56 : 536,347.92 = 218,896.16 : x
  2. Step 2: Convert to fraction form
    388,662.56/536,347.92 = 218,896.16/x
  3. Step 3: Cross multiply
    388,662.56x = 536,347.92 × 218,896.16
  4. Step 4: Simplify right side
    388,662.56x = 117,404,500,111.99
  5. Step 5: Solve for x
    x = 117,404,500,111.99/388,662.56
  6. Step 6: Final answer
    x = 302,073.09

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1.5x scale

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.