Home / 870,780.80-1,306,171.20-309,833.60

Finding the Fourth Proportional to 870,780.80, 1,306,171.20 and 309,833.60

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Solution

The fourth proportional to 870,780.80, 1,306,171.20 and 309,833.60 is: 464,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,780.80 : 1,306,171.20 = 309,833.60 : x
  2. Step 2: Convert to fraction form
    870,780.80/1,306,171.20 = 309,833.60/x
  3. Step 3: Cross multiply
    870,780.80x = 1,306,171.20 × 309,833.60
  4. Step 4: Simplify right side
    870,780.80x = 404,695,725,112.32
  5. Step 5: Solve for x
    x = 404,695,725,112.32/870,780.80
  6. Step 6: Final answer
    x = 464,750.40

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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.