Home / 691,890.89-954,787.77-405,601.65

Finding the Fourth Proportional to 691,890.89, 954,787.77 and 405,601.65

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Solution

The fourth proportional to 691,890.89, 954,787.77 and 405,601.65 is: 559,717.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,890.89 : 954,787.77 = 405,601.65 : x
  2. Step 2: Convert to fraction form
    691,890.89/954,787.77 = 405,601.65/x
  3. Step 3: Cross multiply
    691,890.89x = 954,787.77 × 405,601.65
  4. Step 4: Simplify right side
    691,890.89x = 387,263,494,911.82
  5. Step 5: Solve for x
    x = 387,263,494,911.82/691,890.89
  6. Step 6: Final answer
    x = 559,717.58

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Double scale
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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.