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Finding the Fourth Proportional to 645,992.60, 891,461.12 and 359,512.61

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Solution

The fourth proportional to 645,992.60, 891,461.12 and 359,512.61 is: 496,122.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,992.60 : 891,461.12 = 359,512.61 : x
  2. Step 2: Convert to fraction form
    645,992.60/891,461.12 = 359,512.61/x
  3. Step 3: Cross multiply
    645,992.60x = 891,461.12 × 359,512.61
  4. Step 4: Simplify right side
    645,992.60x = 320,491,507,709.86
  5. Step 5: Solve for x
    x = 320,491,507,709.86/645,992.60
  6. Step 6: Final answer
    x = 496,122.57

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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.