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Finding the Fourth Proportional to 778,446.75, 1,074,256.64 and 420,750.75

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Solution

The fourth proportional to 778,446.75, 1,074,256.64 and 420,750.75 is: 580,636.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,446.75 : 1,074,256.64 = 420,750.75 : x
  2. Step 2: Convert to fraction form
    778,446.75/1,074,256.64 = 420,750.75/x
  3. Step 3: Cross multiply
    778,446.75x = 1,074,256.64 × 420,750.75
  4. Step 4: Simplify right side
    778,446.75x = 451,994,284,868.73
  5. Step 5: Solve for x
    x = 451,994,284,868.73/778,446.75
  6. Step 6: Final answer
    x = 580,636.10

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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.