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Finding the Fourth Proportional to 493,774.20, 740,661.30 and 438,661.80

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Solution

The fourth proportional to 493,774.20, 740,661.30 and 438,661.80 is: 657,992.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,774.20 : 740,661.30 = 438,661.80 : x
  2. Step 2: Convert to fraction form
    493,774.20/740,661.30 = 438,661.80/x
  3. Step 3: Cross multiply
    493,774.20x = 740,661.30 × 438,661.80
  4. Step 4: Simplify right side
    493,774.20x = 324,899,819,048.34
  5. Step 5: Solve for x
    x = 324,899,819,048.34/493,774.20
  6. Step 6: Final answer
    x = 657,992.70

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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.