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Finding the Fourth Proportional to 422,571.40, 634,513.20 and 245,424.40

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Solution

The fourth proportional to 422,571.40, 634,513.20 and 245,424.40 is: 368,517.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,571.40 : 634,513.20 = 245,424.40 : x
  2. Step 2: Convert to fraction form
    422,571.40/634,513.20 = 245,424.40/x
  3. Step 3: Cross multiply
    422,571.40x = 634,513.20 × 245,424.40
  4. Step 4: Simplify right side
    422,571.40x = 155,725,021,402.08
  5. Step 5: Solve for x
    x = 155,725,021,402.08/422,571.40
  6. Step 6: Final answer
    x = 368,517.66

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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.