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Finding the Fourth Proportional to 319,439.90, 479,028.53 and 119,657.45

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Solution

The fourth proportional to 319,439.90, 479,028.53 and 119,657.45 is: 179,436.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,439.90 : 479,028.53 = 119,657.45 : x
  2. Step 2: Convert to fraction form
    319,439.90/479,028.53 = 119,657.45/x
  3. Step 3: Cross multiply
    319,439.90x = 479,028.53 × 119,657.45
  4. Step 4: Simplify right side
    319,439.90x = 57,319,333,873.76
  5. Step 5: Solve for x
    x = 57,319,333,873.76/319,439.90
  6. Step 6: Final answer
    x = 179,436.99

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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.