Home / 872,305.20-1,308,457.80-809,319.60

Finding the Fourth Proportional to 872,305.20, 1,308,457.80 and 809,319.60

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Solution

The fourth proportional to 872,305.20, 1,308,457.80 and 809,319.60 is: 1,213,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,305.20 : 1,308,457.80 = 809,319.60 : x
  2. Step 2: Convert to fraction form
    872,305.20/1,308,457.80 = 809,319.60/x
  3. Step 3: Cross multiply
    872,305.20x = 1,308,457.80 × 809,319.60
  4. Step 4: Simplify right side
    872,305.20x = 1,058,960,543,312.88
  5. Step 5: Solve for x
    x = 1,058,960,543,312.88/872,305.20
  6. Step 6: Final answer
    x = 1,213,979.40

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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.