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Finding the Fourth Proportional to 561,943.70, 842,915.55 and 321,811.10

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Solution

The fourth proportional to 561,943.70, 842,915.55 and 321,811.10 is: 482,716.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,943.70 : 842,915.55 = 321,811.10 : x
  2. Step 2: Convert to fraction form
    561,943.70/842,915.55 = 321,811.10/x
  3. Step 3: Cross multiply
    561,943.70x = 842,915.55 × 321,811.10
  4. Step 4: Simplify right side
    561,943.70x = 271,259,580,352.61
  5. Step 5: Solve for x
    x = 271,259,580,352.61/561,943.70
  6. Step 6: Final answer
    x = 482,716.65

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Half scale
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Double scale
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Similar ratio
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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.