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Finding the Fourth Proportional to 345,446.40, 518,169.61 and 134,936.72

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Solution

The fourth proportional to 345,446.40, 518,169.61 and 134,936.72 is: 202,405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,446.40 : 518,169.61 = 134,936.72 : x
  2. Step 2: Convert to fraction form
    345,446.40/518,169.61 = 134,936.72/x
  3. Step 3: Cross multiply
    345,446.40x = 518,169.61 × 134,936.72
  4. Step 4: Simplify right side
    345,446.40x = 69,920,106,339.02
  5. Step 5: Solve for x
    x = 69,920,106,339.02/345,446.40
  6. Step 6: Final answer
    x = 202,405.08

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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.