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Finding the Fourth Proportional to 304,990.56, 420,875.52 and 169,020.96

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Solution

The fourth proportional to 304,990.56, 420,875.52 and 169,020.96 is: 233,242.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,990.56 : 420,875.52 = 169,020.96 : x
  2. Step 2: Convert to fraction form
    304,990.56/420,875.52 = 169,020.96/x
  3. Step 3: Cross multiply
    304,990.56x = 420,875.52 × 169,020.96
  4. Step 4: Simplify right side
    304,990.56x = 71,136,784,430.90
  5. Step 5: Solve for x
    x = 71,136,784,430.90/304,990.56
  6. Step 6: Final answer
    x = 233,242.58

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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.