Home / 786,005.80-1,179,008.70-287,564.20

Finding the Fourth Proportional to 786,005.80, 1,179,008.70 and 287,564.20

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Solution

The fourth proportional to 786,005.80, 1,179,008.70 and 287,564.20 is: 431,346.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,005.80 : 1,179,008.70 = 287,564.20 : x
  2. Step 2: Convert to fraction form
    786,005.80/1,179,008.70 = 287,564.20/x
  3. Step 3: Cross multiply
    786,005.80x = 1,179,008.70 × 287,564.20
  4. Step 4: Simplify right side
    786,005.80x = 339,040,693,608.54
  5. Step 5: Solve for x
    x = 339,040,693,608.54/786,005.80
  6. Step 6: Final answer
    x = 431,346.30

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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.