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Finding the Fourth Proportional to 688,169.80, 949,689.36 and 378,076.38

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Solution

The fourth proportional to 688,169.80, 949,689.36 and 378,076.38 is: 521,753.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,169.80 : 949,689.36 = 378,076.38 : x
  2. Step 2: Convert to fraction form
    688,169.80/949,689.36 = 378,076.38/x
  3. Step 3: Cross multiply
    688,169.80x = 949,689.36 × 378,076.38
  4. Step 4: Simplify right side
    688,169.80x = 359,055,115,353.32
  5. Step 5: Solve for x
    x = 359,055,115,353.32/688,169.80
  6. Step 6: Final answer
    x = 521,753.67

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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.