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Finding the Fourth Proportional to 431,078.95, 647,190.68 and 368,302.33

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Solution

The fourth proportional to 431,078.95, 647,190.68 and 368,302.33 is: 552,942.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,078.95 : 647,190.68 = 368,302.33 : x
  2. Step 2: Convert to fraction form
    431,078.95/647,190.68 = 368,302.33/x
  3. Step 3: Cross multiply
    431,078.95x = 647,190.68 × 368,302.33
  4. Step 4: Simplify right side
    431,078.95x = 238,361,830,320.82
  5. Step 5: Solve for x
    x = 238,361,830,320.82/431,078.95
  6. Step 6: Final answer
    x = 552,942.41

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1.5x scale

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.