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Finding the Fourth Proportional to 664,430.80, 995,458.20 and 404,294.80

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Solution

The fourth proportional to 664,430.80, 995,458.20 and 404,294.80 is: 605,719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,430.80 : 995,458.20 = 404,294.80 : x
  2. Step 2: Convert to fraction form
    664,430.80/995,458.20 = 404,294.80/x
  3. Step 3: Cross multiply
    664,430.80x = 995,458.20 × 404,294.80
  4. Step 4: Simplify right side
    664,430.80x = 402,458,573,877.36
  5. Step 5: Solve for x
    x = 402,458,573,877.36/664,430.80
  6. Step 6: Final answer
    x = 605,719.32

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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.