Home / 870,705.11-1,306,161.51-421,102.91

Finding the Fourth Proportional to 870,705.11, 1,306,161.51 and 421,102.91

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Solution

The fourth proportional to 870,705.11, 1,306,161.51 and 421,102.91 is: 631,704.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,705.11 : 1,306,161.51 = 421,102.91 : x
  2. Step 2: Convert to fraction form
    870,705.11/1,306,161.51 = 421,102.91/x
  3. Step 3: Cross multiply
    870,705.11x = 1,306,161.51 × 421,102.91
  4. Step 4: Simplify right side
    870,705.11x = 550,028,412,737.43
  5. Step 5: Solve for x
    x = 550,028,412,737.43/870,705.11
  6. Step 6: Final answer
    x = 631,704.59

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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.