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Finding the Fourth Proportional to 678,072.08, 935,745 and 376,271.12

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Solution

The fourth proportional to 678,072.08, 935,745 and 376,271.12 is: 519,257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,072.08 : 935,745 = 376,271.12 : x
  2. Step 2: Convert to fraction form
    678,072.08/935,745 = 376,271.12/x
  3. Step 3: Cross multiply
    678,072.08x = 935,745 × 376,271.12
  4. Step 4: Simplify right side
    678,072.08x = 352,093,819,184.40
  5. Step 5: Solve for x
    x = 352,093,819,184.40/678,072.08
  6. Step 6: Final answer
    x = 519,257.21

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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.