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Finding the Fourth Proportional to 456,644.96, 684,774.72 and 136,842.20

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Solution

The fourth proportional to 456,644.96, 684,774.72 and 136,842.20 is: 205,205.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,644.96 : 684,774.72 = 136,842.20 : x
  2. Step 2: Convert to fraction form
    456,644.96/684,774.72 = 136,842.20/x
  3. Step 3: Cross multiply
    456,644.96x = 684,774.72 × 136,842.20
  4. Step 4: Simplify right side
    456,644.96x = 93,706,079,189.18
  5. Step 5: Solve for x
    x = 93,706,079,189.18/456,644.96
  6. Step 6: Final answer
    x = 205,205.55

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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.