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Finding the Fourth Proportional to 678,508.20, 936,304.74 and 376,682.76

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Solution

The fourth proportional to 678,508.20, 936,304.74 and 376,682.76 is: 519,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,508.20 : 936,304.74 = 376,682.76 : x
  2. Step 2: Convert to fraction form
    678,508.20/936,304.74 = 376,682.76/x
  3. Step 3: Cross multiply
    678,508.20x = 936,304.74 × 376,682.76
  4. Step 4: Simplify right side
    678,508.20x = 352,689,853,664.28
  5. Step 5: Solve for x
    x = 352,689,853,664.28/678,508.20
  6. Step 6: Final answer
    x = 519,801.90

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1.5x scale

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.