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Finding the Fourth Proportional to 668,492.21, 922,220.70 and 396,571.57

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Solution

The fourth proportional to 668,492.21, 922,220.70 and 396,571.57 is: 547,091.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,492.21 : 922,220.70 = 396,571.57 : x
  2. Step 2: Convert to fraction form
    668,492.21/922,220.70 = 396,571.57/x
  3. Step 3: Cross multiply
    668,492.21x = 922,220.70 × 396,571.57
  4. Step 4: Simplify right side
    668,492.21x = 365,726,510,885.50
  5. Step 5: Solve for x
    x = 365,726,510,885.50/668,492.21
  6. Step 6: Final answer
    x = 547,091.66

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1.5x scale

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.