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Finding the Fourth Proportional to 678,081.50, 935,796.21 and 376,275.50

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Solution

The fourth proportional to 678,081.50, 935,796.21 and 376,275.50 is: 519,284.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,081.50 : 935,796.21 = 376,275.50 : x
  2. Step 2: Convert to fraction form
    678,081.50/935,796.21 = 376,275.50/x
  3. Step 3: Cross multiply
    678,081.50x = 935,796.21 × 376,275.50
  4. Step 4: Simplify right side
    678,081.50x = 352,117,186,815.86
  5. Step 5: Solve for x
    x = 352,117,186,815.86/678,081.50
  6. Step 6: Final answer
    x = 519,284.46

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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.