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Finding the Fourth Proportional to 678,019, 935,666.22 and 376,261.56

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Solution

The fourth proportional to 678,019, 935,666.22 and 376,261.56 is: 519,240.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,019 : 935,666.22 = 376,261.56 : x
  2. Step 2: Convert to fraction form
    678,019/935,666.22 = 376,261.56/x
  3. Step 3: Cross multiply
    678,019x = 935,666.22 × 376,261.56
  4. Step 4: Simplify right side
    678,019x = 352,055,231,576.50
  5. Step 5: Solve for x
    x = 352,055,231,576.50/678,019
  6. Step 6: Final answer
    x = 519,240.95

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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.