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Finding the Fourth Proportional to 279,990.42, 386,394.75 and 152,673

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Solution

The fourth proportional to 279,990.42, 386,394.75 and 152,673 is: 210,693.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,990.42 : 386,394.75 = 152,673 : x
  2. Step 2: Convert to fraction form
    279,990.42/386,394.75 = 152,673/x
  3. Step 3: Cross multiply
    279,990.42x = 386,394.75 × 152,673
  4. Step 4: Simplify right side
    279,990.42x = 58,992,045,666.75
  5. Step 5: Solve for x
    x = 58,992,045,666.75/279,990.42
  6. Step 6: Final answer
    x = 210,693.09

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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.