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Finding the Fourth Proportional to 820,909.80, 1,231,364.70 and 708,716.70

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Solution

The fourth proportional to 820,909.80, 1,231,364.70 and 708,716.70 is: 1,063,075.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,909.80 : 1,231,364.70 = 708,716.70 : x
  2. Step 2: Convert to fraction form
    820,909.80/1,231,364.70 = 708,716.70/x
  3. Step 3: Cross multiply
    820,909.80x = 1,231,364.70 × 708,716.70
  4. Step 4: Simplify right side
    820,909.80x = 872,688,726,680.49
  5. Step 5: Solve for x
    x = 872,688,726,680.49/820,909.80
  6. Step 6: Final answer
    x = 1,063,075.05

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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.