Home / 870,999.40-1,306,887.90-310,436.20

Finding the Fourth Proportional to 870,999.40, 1,306,887.90 and 310,436.20

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Solution

The fourth proportional to 870,999.40, 1,306,887.90 and 310,436.20 is: 465,792.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,999.40 : 1,306,887.90 = 310,436.20 : x
  2. Step 2: Convert to fraction form
    870,999.40/1,306,887.90 = 310,436.20/x
  3. Step 3: Cross multiply
    870,999.40x = 1,306,887.90 × 310,436.20
  4. Step 4: Simplify right side
    870,999.40x = 405,705,313,501.98
  5. Step 5: Solve for x
    x = 405,705,313,501.98/870,999.40
  6. Step 6: Final answer
    x = 465,792.87

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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.