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Finding the Fourth Proportional to 319,619.66, 479,507.51 and 106,387.16

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Solution

The fourth proportional to 319,619.66, 479,507.51 and 106,387.16 is: 159,606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,619.66 : 479,507.51 = 106,387.16 : x
  2. Step 2: Convert to fraction form
    319,619.66/479,507.51 = 106,387.16/x
  3. Step 3: Cross multiply
    319,619.66x = 479,507.51 × 106,387.16
  4. Step 4: Simplify right side
    319,619.66x = 51,013,440,056.00
  5. Step 5: Solve for x
    x = 51,013,440,056.00/319,619.66
  6. Step 6: Final answer
    x = 159,606.71

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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.