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Finding the Fourth Proportional to 354,940.60, 531,374.10 and 317,615.80

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Solution

The fourth proportional to 354,940.60, 531,374.10 and 317,615.80 is: 475,495.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,940.60 : 531,374.10 = 317,615.80 : x
  2. Step 2: Convert to fraction form
    354,940.60/531,374.10 = 317,615.80/x
  3. Step 3: Cross multiply
    354,940.60x = 531,374.10 × 317,615.80
  4. Step 4: Simplify right side
    354,940.60x = 168,772,809,870.78
  5. Step 5: Solve for x
    x = 168,772,809,870.78/354,940.60
  6. Step 6: Final answer
    x = 475,495.93

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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.