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Finding the Fourth Proportional to 561,743.20, 840,865.20 and 404,279.20

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Solution

The fourth proportional to 561,743.20, 840,865.20 and 404,279.20 is: 605,159.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,743.20 : 840,865.20 = 404,279.20 : x
  2. Step 2: Convert to fraction form
    561,743.20/840,865.20 = 404,279.20/x
  3. Step 3: Cross multiply
    561,743.20x = 840,865.20 × 404,279.20
  4. Step 4: Simplify right side
    561,743.20x = 339,944,310,363.84
  5. Step 5: Solve for x
    x = 339,944,310,363.84/561,743.20
  6. Step 6: Final answer
    x = 605,159.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.