Home / 678,384.72-936,181.80-391,929.84

Finding the Fourth Proportional to 678,384.72, 936,181.80 and 391,929.84

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Solution

The fourth proportional to 678,384.72, 936,181.80 and 391,929.84 is: 540,869.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,384.72 : 936,181.80 = 391,929.84 : x
  2. Step 2: Convert to fraction form
    678,384.72/936,181.80 = 391,929.84/x
  3. Step 3: Cross multiply
    678,384.72x = 936,181.80 × 391,929.84
  4. Step 4: Simplify right side
    678,384.72x = 366,917,583,084.91
  5. Step 5: Solve for x
    x = 366,917,583,084.91/678,384.72
  6. Step 6: Final answer
    x = 540,869.47

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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.