Home / 678,018.78-935,597.72-406,079.50

Finding the Fourth Proportional to 678,018.78, 935,597.72 and 406,079.50

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Solution

The fourth proportional to 678,018.78, 935,597.72 and 406,079.50 is: 560,348.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,018.78 : 935,597.72 = 406,079.50 : x
  2. Step 2: Convert to fraction form
    678,018.78/935,597.72 = 406,079.50/x
  3. Step 3: Cross multiply
    678,018.78x = 935,597.72 × 406,079.50
  4. Step 4: Simplify right side
    678,018.78x = 379,927,054,338.74
  5. Step 5: Solve for x
    x = 379,927,054,338.74/678,018.78
  6. Step 6: Final answer
    x = 560,348.87

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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.