Home / 870,707.62-1,306,165.27-421,105.41

Finding the Fourth Proportional to 870,707.62, 1,306,165.27 and 421,105.41

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Solution

The fourth proportional to 870,707.62, 1,306,165.27 and 421,105.41 is: 631,708.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,707.62 : 1,306,165.27 = 421,105.41 : x
  2. Step 2: Convert to fraction form
    870,707.62/1,306,165.27 = 421,105.41/x
  3. Step 3: Cross multiply
    870,707.62x = 1,306,165.27 × 421,105.41
  4. Step 4: Simplify right side
    870,707.62x = 550,033,261,551.11
  5. Step 5: Solve for x
    x = 550,033,261,551.11/870,707.62
  6. Step 6: Final answer
    x = 631,708.34

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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.