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Finding the Fourth Proportional to 663,282.25, 915,477.24 and 421,517.68

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Solution

The fourth proportional to 663,282.25, 915,477.24 and 421,517.68 is: 581,788.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,282.25 : 915,477.24 = 421,517.68 : x
  2. Step 2: Convert to fraction form
    663,282.25/915,477.24 = 421,517.68/x
  3. Step 3: Cross multiply
    663,282.25x = 915,477.24 × 421,517.68
  4. Step 4: Simplify right side
    663,282.25x = 385,889,842,297.60
  5. Step 5: Solve for x
    x = 385,889,842,297.60/663,282.25
  6. Step 6: Final answer
    x = 581,788.28

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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.