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Finding the Fourth Proportional to 661,967.20, 992,950.80 and 396,546.40

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Solution

The fourth proportional to 661,967.20, 992,950.80 and 396,546.40 is: 594,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,967.20 : 992,950.80 = 396,546.40 : x
  2. Step 2: Convert to fraction form
    661,967.20/992,950.80 = 396,546.40/x
  3. Step 3: Cross multiply
    661,967.20x = 992,950.80 × 396,546.40
  4. Step 4: Simplify right side
    661,967.20x = 393,751,065,117.12
  5. Step 5: Solve for x
    x = 393,751,065,117.12/661,967.20
  6. Step 6: Final answer
    x = 594,819.60

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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.