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Finding the Fourth Proportional to 319,688, 479,527.83 and 91,989.56

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Solution

The fourth proportional to 319,688, 479,527.83 and 91,989.56 is: 137,983.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,688 : 479,527.83 = 91,989.56 : x
  2. Step 2: Convert to fraction form
    319,688/479,527.83 = 91,989.56/x
  3. Step 3: Cross multiply
    319,688x = 479,527.83 × 91,989.56
  4. Step 4: Simplify right side
    319,688x = 44,111,554,089.45
  5. Step 5: Solve for x
    x = 44,111,554,089.45/319,688
  6. Step 6: Final answer
    x = 137,983.14

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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.