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Finding the Fourth Proportional to 662,786.87, 992,800.94 and 421,706.57

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Solution

The fourth proportional to 662,786.87, 992,800.94 and 421,706.57 is: 631,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,786.87 : 992,800.94 = 421,706.57 : x
  2. Step 2: Convert to fraction form
    662,786.87/992,800.94 = 421,706.57/x
  3. Step 3: Cross multiply
    662,786.87x = 992,800.94 × 421,706.57
  4. Step 4: Simplify right side
    662,786.87x = 418,670,677,612.14
  5. Step 5: Solve for x
    x = 418,670,677,612.14/662,786.87
  6. Step 6: Final answer
    x = 631,682.21

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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.