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Finding the Fourth Proportional to 645,994.11, 891,463.17 and 359,514.12

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Solution

The fourth proportional to 645,994.11, 891,463.17 and 359,514.12 is: 496,124.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,994.11 : 891,463.17 = 359,514.12 : x
  2. Step 2: Convert to fraction form
    645,994.11/891,463.17 = 359,514.12/x
  3. Step 3: Cross multiply
    645,994.11x = 891,463.17 × 359,514.12
  4. Step 4: Simplify right side
    645,994.11x = 320,493,597,074.96
  5. Step 5: Solve for x
    x = 320,493,597,074.96/645,994.11
  6. Step 6: Final answer
    x = 496,124.64

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Double scale
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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.