Home / 721,805.80-1,082,708.70-438,370.60

Finding the Fourth Proportional to 721,805.80, 1,082,708.70 and 438,370.60

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Solution

The fourth proportional to 721,805.80, 1,082,708.70 and 438,370.60 is: 657,555.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,805.80 : 1,082,708.70 = 438,370.60 : x
  2. Step 2: Convert to fraction form
    721,805.80/1,082,708.70 = 438,370.60/x
  3. Step 3: Cross multiply
    721,805.80x = 1,082,708.70 × 438,370.60
  4. Step 4: Simplify right side
    721,805.80x = 474,627,662,444.22
  5. Step 5: Solve for x
    x = 474,627,662,444.22/721,805.80
  6. Step 6: Final answer
    x = 657,555.90

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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.