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Finding the Fourth Proportional to 304,830.54, 420,871.54 and 190,283.58

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Solution

The fourth proportional to 304,830.54, 420,871.54 and 190,283.58 is: 262,719.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,830.54 : 420,871.54 = 190,283.58 : x
  2. Step 2: Convert to fraction form
    304,830.54/420,871.54 = 190,283.58/x
  3. Step 3: Cross multiply
    304,830.54x = 420,871.54 × 190,283.58
  4. Step 4: Simplify right side
    304,830.54x = 80,084,943,351.31
  5. Step 5: Solve for x
    x = 80,084,943,351.31/304,830.54
  6. Step 6: Final answer
    x = 262,719.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.