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Finding the Fourth Proportional to 256,930.80, 385,338.60 and 168,802.80

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Solution

The fourth proportional to 256,930.80, 385,338.60 and 168,802.80 is: 253,166.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,930.80 : 385,338.60 = 168,802.80 : x
  2. Step 2: Convert to fraction form
    256,930.80/385,338.60 = 168,802.80/x
  3. Step 3: Cross multiply
    256,930.80x = 385,338.60 × 168,802.80
  4. Step 4: Simplify right side
    256,930.80x = 65,046,234,628.08
  5. Step 5: Solve for x
    x = 65,046,234,628.08/256,930.80
  6. Step 6: Final answer
    x = 253,166.36

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1.5x scale

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.