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Finding the Fourth Proportional to 492,741.70, 739,112.55 and 212,805.70

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Solution

The fourth proportional to 492,741.70, 739,112.55 and 212,805.70 is: 319,208.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,741.70 : 739,112.55 = 212,805.70 : x
  2. Step 2: Convert to fraction form
    492,741.70/739,112.55 = 212,805.70/x
  3. Step 3: Cross multiply
    492,741.70x = 739,112.55 × 212,805.70
  4. Step 4: Simplify right side
    492,741.70x = 157,287,363,581.54
  5. Step 5: Solve for x
    x = 157,287,363,581.54/492,741.70
  6. Step 6: Final answer
    x = 319,208.55

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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.