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Finding the Fourth Proportional to 561,719.20, 840,829.20 and 404,255.20

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Solution

The fourth proportional to 561,719.20, 840,829.20 and 404,255.20 is: 605,123.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,719.20 : 840,829.20 = 404,255.20 : x
  2. Step 2: Convert to fraction form
    561,719.20/840,829.20 = 404,255.20/x
  3. Step 3: Cross multiply
    561,719.20x = 840,829.20 × 404,255.20
  4. Step 4: Simplify right side
    561,719.20x = 339,909,576,411.84
  5. Step 5: Solve for x
    x = 339,909,576,411.84/561,719.20
  6. Step 6: Final answer
    x = 605,123.66

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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.