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Finding the Fourth Proportional to 664,382.80, 995,386.20 and 404,246.80

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Solution

The fourth proportional to 664,382.80, 995,386.20 and 404,246.80 is: 605,647.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,382.80 : 995,386.20 = 404,246.80 : x
  2. Step 2: Convert to fraction form
    664,382.80/995,386.20 = 404,246.80/x
  3. Step 3: Cross multiply
    664,382.80x = 995,386.20 × 404,246.80
  4. Step 4: Simplify right side
    664,382.80x = 402,381,686,114.16
  5. Step 5: Solve for x
    x = 402,381,686,114.16/664,382.80
  6. Step 6: Final answer
    x = 605,647.36

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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.