Home / 749,072.80-1,121,276.40-432,589.60

Finding the Fourth Proportional to 749,072.80, 1,121,276.40 and 432,589.60

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Solution

The fourth proportional to 749,072.80, 1,121,276.40 and 432,589.60 is: 647,537.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    749,072.80 : 1,121,276.40 = 432,589.60 : x
  2. Step 2: Convert to fraction form
    749,072.80/1,121,276.40 = 432,589.60/x
  3. Step 3: Cross multiply
    749,072.80x = 1,121,276.40 × 432,589.60
  4. Step 4: Simplify right side
    749,072.80x = 485,052,509,365.44
  5. Step 5: Solve for x
    x = 485,052,509,365.44/749,072.80
  6. Step 6: Final answer
    x = 647,537.21

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Double scale
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Similar ratio
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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.