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Finding the Fourth Proportional to 319,891.28, 479,703.67 and 130,222.99

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Solution

The fourth proportional to 319,891.28, 479,703.67 and 130,222.99 is: 195,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,891.28 : 479,703.67 = 130,222.99 : x
  2. Step 2: Convert to fraction form
    319,891.28/479,703.67 = 130,222.99/x
  3. Step 3: Cross multiply
    319,891.28x = 479,703.67 × 130,222.99
  4. Step 4: Simplify right side
    319,891.28x = 62,468,446,495.45
  5. Step 5: Solve for x
    x = 62,468,446,495.45/319,891.28
  6. Step 6: Final answer
    x = 195,280.24

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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.