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Finding the Fourth Proportional to 870,288.33, 1,200,978.72 and 483,080.88

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Solution

The fourth proportional to 870,288.33, 1,200,978.72 and 483,080.88 is: 666,640.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,288.33 : 1,200,978.72 = 483,080.88 : x
  2. Step 2: Convert to fraction form
    870,288.33/1,200,978.72 = 483,080.88/x
  3. Step 3: Cross multiply
    870,288.33x = 1,200,978.72 × 483,080.88
  4. Step 4: Simplify right side
    870,288.33x = 580,169,856,918.87
  5. Step 5: Solve for x
    x = 580,169,856,918.87/870,288.33
  6. Step 6: Final answer
    x = 666,640.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.