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Finding the Fourth Proportional to 418,783.68, 628,116.21 and 134,436.79

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Solution

The fourth proportional to 418,783.68, 628,116.21 and 134,436.79 is: 201,636.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,783.68 : 628,116.21 = 134,436.79 : x
  2. Step 2: Convert to fraction form
    418,783.68/628,116.21 = 134,436.79/x
  3. Step 3: Cross multiply
    418,783.68x = 628,116.21 × 134,436.79
  4. Step 4: Simplify right side
    418,783.68x = 84,441,925,848.88
  5. Step 5: Solve for x
    x = 84,441,925,848.88/418,783.68
  6. Step 6: Final answer
    x = 201,636.14

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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.