Home / 678,685.11-1,018,456.67-379,362.06

Finding the Fourth Proportional to 678,685.11, 1,018,456.67 and 379,362.06

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Solution

The fourth proportional to 678,685.11, 1,018,456.67 and 379,362.06 is: 569,282.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,685.11 : 1,018,456.67 = 379,362.06 : x
  2. Step 2: Convert to fraction form
    678,685.11/1,018,456.67 = 379,362.06/x
  3. Step 3: Cross multiply
    678,685.11x = 1,018,456.67 × 379,362.06
  4. Step 4: Simplify right side
    678,685.11x = 386,363,818,455.13
  5. Step 5: Solve for x
    x = 386,363,818,455.13/678,685.11
  6. Step 6: Final answer
    x = 569,282.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.