Home / 870,128.40-1,305,192.60-811,079.40

Finding the Fourth Proportional to 870,128.40, 1,305,192.60 and 811,079.40

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Solution

The fourth proportional to 870,128.40, 1,305,192.60 and 811,079.40 is: 1,216,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,128.40 : 1,305,192.60 = 811,079.40 : x
  2. Step 2: Convert to fraction form
    870,128.40/1,305,192.60 = 811,079.40/x
  3. Step 3: Cross multiply
    870,128.40x = 1,305,192.60 × 811,079.40
  4. Step 4: Simplify right side
    870,128.40x = 1,058,614,830,892.44
  5. Step 5: Solve for x
    x = 1,058,614,830,892.44/870,128.40
  6. Step 6: Final answer
    x = 1,216,619.10

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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.