Home / 642,628.40-963,942.60-493,329.20

Finding the Fourth Proportional to 642,628.40, 963,942.60 and 493,329.20

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Solution

The fourth proportional to 642,628.40, 963,942.60 and 493,329.20 is: 739,993.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,628.40 : 963,942.60 = 493,329.20 : x
  2. Step 2: Convert to fraction form
    642,628.40/963,942.60 = 493,329.20/x
  3. Step 3: Cross multiply
    642,628.40x = 963,942.60 × 493,329.20
  4. Step 4: Simplify right side
    642,628.40x = 475,541,031,703.92
  5. Step 5: Solve for x
    x = 475,541,031,703.92/642,628.40
  6. Step 6: Final answer
    x = 739,993.80

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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.