Home / 870,129.20-1,305,229.19-414,486.21

Finding the Fourth Proportional to 870,129.20, 1,305,229.19 and 414,486.21

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Solution

The fourth proportional to 870,129.20, 1,305,229.19 and 414,486.21 is: 621,746.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,129.20 : 1,305,229.19 = 414,486.21 : x
  2. Step 2: Convert to fraction form
    870,129.20/1,305,229.19 = 414,486.21/x
  3. Step 3: Cross multiply
    870,129.20x = 1,305,229.19 × 414,486.21
  4. Step 4: Simplify right side
    870,129.20x = 540,999,500,144.47
  5. Step 5: Solve for x
    x = 540,999,500,144.47/870,129.20
  6. Step 6: Final answer
    x = 621,746.17

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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.