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Finding the Fourth Proportional to 670,715.21, 925,313.85 and 380,265.61

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Solution

The fourth proportional to 670,715.21, 925,313.85 and 380,265.61 is: 524,611.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,715.21 : 925,313.85 = 380,265.61 : x
  2. Step 2: Convert to fraction form
    670,715.21/925,313.85 = 380,265.61/x
  3. Step 3: Cross multiply
    670,715.21x = 925,313.85 × 380,265.61
  4. Step 4: Simplify right side
    670,715.21x = 351,865,035,611.70
  5. Step 5: Solve for x
    x = 351,865,035,611.70/670,715.21
  6. Step 6: Final answer
    x = 524,611.68

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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.