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Finding the Fourth Proportional to 778,680, 1,073,604.78 and 649,804.14

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Solution

The fourth proportional to 778,680, 1,073,604.78 and 649,804.14 is: 895,917.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,680 : 1,073,604.78 = 649,804.14 : x
  2. Step 2: Convert to fraction form
    778,680/1,073,604.78 = 649,804.14/x
  3. Step 3: Cross multiply
    778,680x = 1,073,604.78 × 649,804.14
  4. Step 4: Simplify right side
    778,680x = 697,632,830,767.79
  5. Step 5: Solve for x
    x = 697,632,830,767.79/778,680
  6. Step 6: Final answer
    x = 895,917.23

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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.