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Finding the Fourth Proportional to 368,428.30, 552,934.05 and 143,896.30

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Solution

The fourth proportional to 368,428.30, 552,934.05 and 143,896.30 is: 215,958.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,428.30 : 552,934.05 = 143,896.30 : x
  2. Step 2: Convert to fraction form
    368,428.30/552,934.05 = 143,896.30/x
  3. Step 3: Cross multiply
    368,428.30x = 552,934.05 × 143,896.30
  4. Step 4: Simplify right side
    368,428.30x = 79,565,163,939.02
  5. Step 5: Solve for x
    x = 79,565,163,939.02/368,428.30
  6. Step 6: Final answer
    x = 215,958.34

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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.