Home / 870,621.40-1,305,932.10-821,632.60

Finding the Fourth Proportional to 870,621.40, 1,305,932.10 and 821,632.60

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Solution

The fourth proportional to 870,621.40, 1,305,932.10 and 821,632.60 is: 1,232,448.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,621.40 : 1,305,932.10 = 821,632.60 : x
  2. Step 2: Convert to fraction form
    870,621.40/1,305,932.10 = 821,632.60/x
  3. Step 3: Cross multiply
    870,621.40x = 1,305,932.10 × 821,632.60
  4. Step 4: Simplify right side
    870,621.40x = 1,072,996,386,746.46
  5. Step 5: Solve for x
    x = 1,072,996,386,746.46/870,621.40
  6. Step 6: Final answer
    x = 1,232,448.90

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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.