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Finding the Fourth Proportional to 678,780.24, 936,718.92 and 376,974.24

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Solution

The fourth proportional to 678,780.24, 936,718.92 and 376,974.24 is: 520,225.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,780.24 : 936,718.92 = 376,974.24 : x
  2. Step 2: Convert to fraction form
    678,780.24/936,718.92 = 376,974.24/x
  3. Step 3: Cross multiply
    678,780.24x = 936,718.92 × 376,974.24
  4. Step 4: Simplify right side
    678,780.24x = 353,118,902,960.62
  5. Step 5: Solve for x
    x = 353,118,902,960.62/678,780.24
  6. Step 6: Final answer
    x = 520,225.67

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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.