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Finding the Fourth Proportional to 661,646.20, 992,469.30 and 603,909.40

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Solution

The fourth proportional to 661,646.20, 992,469.30 and 603,909.40 is: 905,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,646.20 : 992,469.30 = 603,909.40 : x
  2. Step 2: Convert to fraction form
    661,646.20/992,469.30 = 603,909.40/x
  3. Step 3: Cross multiply
    661,646.20x = 992,469.30 × 603,909.40
  4. Step 4: Simplify right side
    661,646.20x = 599,361,539,481.42
  5. Step 5: Solve for x
    x = 599,361,539,481.42/661,646.20
  6. Step 6: Final answer
    x = 905,864.10

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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.