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Finding the Fourth Proportional to 319,641.95, 479,540.99 and 106,409.45

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Solution

The fourth proportional to 319,641.95, 479,540.99 and 106,409.45 is: 159,640.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,641.95 : 479,540.99 = 106,409.45 : x
  2. Step 2: Convert to fraction form
    319,641.95/479,540.99 = 106,409.45/x
  3. Step 3: Cross multiply
    319,641.95x = 479,540.99 × 106,409.45
  4. Step 4: Simplify right side
    319,641.95x = 51,027,690,068.60
  5. Step 5: Solve for x
    x = 51,027,690,068.60/319,641.95
  6. Step 6: Final answer
    x = 159,640.16

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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.