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Finding the Fourth Proportional to 539,703.80, 809,555.70 and 165,745.40

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Solution

The fourth proportional to 539,703.80, 809,555.70 and 165,745.40 is: 248,618.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,703.80 : 809,555.70 = 165,745.40 : x
  2. Step 2: Convert to fraction form
    539,703.80/809,555.70 = 165,745.40/x
  3. Step 3: Cross multiply
    539,703.80x = 809,555.70 × 165,745.40
  4. Step 4: Simplify right side
    539,703.80x = 134,180,133,318.78
  5. Step 5: Solve for x
    x = 134,180,133,318.78/539,703.80
  6. Step 6: Final answer
    x = 248,618.10

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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.