Home / 645,923.33-891,360.99-404,339.11

Finding the Fourth Proportional to 645,923.33, 891,360.99 and 404,339.11

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Solution

The fourth proportional to 645,923.33, 891,360.99 and 404,339.11 is: 557,979.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,923.33 : 891,360.99 = 404,339.11 : x
  2. Step 2: Convert to fraction form
    645,923.33/891,360.99 = 404,339.11/x
  3. Step 3: Cross multiply
    645,923.33x = 891,360.99 × 404,339.11
  4. Step 4: Simplify right side
    645,923.33x = 360,412,107,156.92
  5. Step 5: Solve for x
    x = 360,412,107,156.92/645,923.33
  6. Step 6: Final answer
    x = 557,979.70

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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.