Home / 766,019.70-1,057,135.86-421,870.68

Finding the Fourth Proportional to 766,019.70, 1,057,135.86 and 421,870.68

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Solution

The fourth proportional to 766,019.70, 1,057,135.86 and 421,870.68 is: 582,197.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,019.70 : 1,057,135.86 = 421,870.68 : x
  2. Step 2: Convert to fraction form
    766,019.70/1,057,135.86 = 421,870.68/x
  3. Step 3: Cross multiply
    766,019.70x = 1,057,135.86 × 421,870.68
  4. Step 4: Simplify right side
    766,019.70x = 445,974,624,110.59
  5. Step 5: Solve for x
    x = 445,974,624,110.59/766,019.70
  6. Step 6: Final answer
    x = 582,197.33

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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.