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Finding the Fourth Proportional to 279,509.01, 385,723.31 and 152,185.38

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Solution

The fourth proportional to 279,509.01, 385,723.31 and 152,185.38 is: 210,016.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,509.01 : 385,723.31 = 152,185.38 : x
  2. Step 2: Convert to fraction form
    279,509.01/385,723.31 = 152,185.38/x
  3. Step 3: Cross multiply
    279,509.01x = 385,723.31 × 152,185.38
  4. Step 4: Simplify right side
    279,509.01x = 58,701,448,507.21
  5. Step 5: Solve for x
    x = 58,701,448,507.21/279,509.01
  6. Step 6: Final answer
    x = 210,016.30

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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.