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Finding the Fourth Proportional to 839,806.10, 1,259,703.39 and 208,718.90

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Solution

The fourth proportional to 839,806.10, 1,259,703.39 and 208,718.90 is: 313,076.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,806.10 : 1,259,703.39 = 208,718.90 : x
  2. Step 2: Convert to fraction form
    839,806.10/1,259,703.39 = 208,718.90/x
  3. Step 3: Cross multiply
    839,806.10x = 1,259,703.39 × 208,718.90
  4. Step 4: Simplify right side
    839,806.10x = 262,923,905,887.07
  5. Step 5: Solve for x
    x = 262,923,905,887.07/839,806.10
  6. Step 6: Final answer
    x = 313,076.92

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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.