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Finding the Fourth Proportional to 661,645.20, 992,467.80 and 451,693.20

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Solution

The fourth proportional to 661,645.20, 992,467.80 and 451,693.20 is: 677,539.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,645.20 : 992,467.80 = 451,693.20 : x
  2. Step 2: Convert to fraction form
    661,645.20/992,467.80 = 451,693.20/x
  3. Step 3: Cross multiply
    661,645.20x = 992,467.80 × 451,693.20
  4. Step 4: Simplify right side
    661,645.20x = 448,290,956,478.96
  5. Step 5: Solve for x
    x = 448,290,956,478.96/661,645.20
  6. Step 6: Final answer
    x = 677,539.80

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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.