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Finding the Fourth Proportional to 678,018, 935,664.84 and 376,260.56

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Solution

The fourth proportional to 678,018, 935,664.84 and 376,260.56 is: 519,239.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,018 : 935,664.84 = 376,260.56 : x
  2. Step 2: Convert to fraction form
    678,018/935,664.84 = 376,260.56/x
  3. Step 3: Cross multiply
    678,018x = 935,664.84 × 376,260.56
  4. Step 4: Simplify right side
    678,018x = 352,053,776,670.71
  5. Step 5: Solve for x
    x = 352,053,776,670.71/678,018
  6. Step 6: Final answer
    x = 519,239.57

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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.