Home / 870,998.40-1,306,886.40-310,435.20

Finding the Fourth Proportional to 870,998.40, 1,306,886.40 and 310,435.20

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Solution

The fourth proportional to 870,998.40, 1,306,886.40 and 310,435.20 is: 465,791.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,998.40 : 1,306,886.40 = 310,435.20 : x
  2. Step 2: Convert to fraction form
    870,998.40/1,306,886.40 = 310,435.20/x
  3. Step 3: Cross multiply
    870,998.40x = 1,306,886.40 × 310,435.20
  4. Step 4: Simplify right side
    870,998.40x = 405,703,540,961.28
  5. Step 5: Solve for x
    x = 405,703,540,961.28/870,998.40
  6. Step 6: Final answer
    x = 465,791.37

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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.