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Finding the Fourth Proportional to 661,645.20, 992,467.80 and 603,908.40

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Solution

The fourth proportional to 661,645.20, 992,467.80 and 603,908.40 is: 905,862.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,645.20 : 992,467.80 = 603,908.40 : x
  2. Step 2: Convert to fraction form
    661,645.20/992,467.80 = 603,908.40/x
  3. Step 3: Cross multiply
    661,645.20x = 992,467.80 × 603,908.40
  4. Step 4: Simplify right side
    661,645.20x = 599,359,641,149.52
  5. Step 5: Solve for x
    x = 599,359,641,149.52/661,645.20
  6. Step 6: Final answer
    x = 905,862.60

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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.