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Finding the Fourth Proportional to 647,994.80, 971,992.20 and 410,632.40

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Solution

The fourth proportional to 647,994.80, 971,992.20 and 410,632.40 is: 615,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,994.80 : 971,992.20 = 410,632.40 : x
  2. Step 2: Convert to fraction form
    647,994.80/971,992.20 = 410,632.40/x
  3. Step 3: Cross multiply
    647,994.80x = 971,992.20 × 410,632.40
  4. Step 4: Simplify right side
    647,994.80x = 399,131,489,867.28
  5. Step 5: Solve for x
    x = 399,131,489,867.28/647,994.80
  6. Step 6: Final answer
    x = 615,948.60

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Similar ratio
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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.