Home / 870,538.20-1,305,019.44-309,441.48

Finding the Fourth Proportional to 870,538.20, 1,305,019.44 and 309,441.48

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Solution

The fourth proportional to 870,538.20, 1,305,019.44 and 309,441.48 is: 463,882.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,538.20 : 1,305,019.44 = 309,441.48 : x
  2. Step 2: Convert to fraction form
    870,538.20/1,305,019.44 = 309,441.48/x
  3. Step 3: Cross multiply
    870,538.20x = 1,305,019.44 × 309,441.48
  4. Step 4: Simplify right side
    870,538.20x = 403,827,146,942.37
  5. Step 5: Solve for x
    x = 403,827,146,942.37/870,538.20
  6. Step 6: Final answer
    x = 463,882.17

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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.