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Finding the Fourth Proportional to 319,374.90, 478,880.10 and 119,701.80

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Solution

The fourth proportional to 319,374.90, 478,880.10 and 119,701.80 is: 179,484.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,374.90 : 478,880.10 = 119,701.80 : x
  2. Step 2: Convert to fraction form
    319,374.90/478,880.10 = 119,701.80/x
  3. Step 3: Cross multiply
    319,374.90x = 478,880.10 × 119,701.80
  4. Step 4: Simplify right side
    319,374.90x = 57,322,809,954.18
  5. Step 5: Solve for x
    x = 57,322,809,954.18/319,374.90
  6. Step 6: Final answer
    x = 179,484.39

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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.