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Finding the Fourth Proportional to 418,696.76, 628,033.43 and 134,385.08

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Solution

The fourth proportional to 418,696.76, 628,033.43 and 134,385.08 is: 201,573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,696.76 : 628,033.43 = 134,385.08 : x
  2. Step 2: Convert to fraction form
    418,696.76/628,033.43 = 134,385.08/x
  3. Step 3: Cross multiply
    418,696.76x = 628,033.43 × 134,385.08
  4. Step 4: Simplify right side
    418,696.76x = 84,398,319,929.02
  5. Step 5: Solve for x
    x = 84,398,319,929.02/418,696.76
  6. Step 6: Final answer
    x = 201,573.85

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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.