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Finding the Fourth Proportional to 441,390.40, 661,405.20 and 328,541.20

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Solution

The fourth proportional to 441,390.40, 661,405.20 and 328,541.20 is: 492,305.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    441,390.40 : 661,405.20 = 328,541.20 : x
  2. Step 2: Convert to fraction form
    441,390.40/661,405.20 = 328,541.20/x
  3. Step 3: Cross multiply
    441,390.40x = 661,405.20 × 328,541.20
  4. Step 4: Simplify right side
    441,390.40x = 217,298,858,094.24
  5. Step 5: Solve for x
    x = 217,298,858,094.24/441,390.40
  6. Step 6: Final answer
    x = 492,305.36

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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.