Home / 509,947.70-764,921.55-210,328.70

Finding the Fourth Proportional to 509,947.70, 764,921.55 and 210,328.70

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Solution

The fourth proportional to 509,947.70, 764,921.55 and 210,328.70 is: 315,493.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,947.70 : 764,921.55 = 210,328.70 : x
  2. Step 2: Convert to fraction form
    509,947.70/764,921.55 = 210,328.70/x
  3. Step 3: Cross multiply
    509,947.70x = 764,921.55 × 210,328.70
  4. Step 4: Simplify right side
    509,947.70x = 160,884,955,213.49
  5. Step 5: Solve for x
    x = 160,884,955,213.49/509,947.70
  6. Step 6: Final answer
    x = 315,493.05

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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.