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Finding the Fourth Proportional to 353,051.28, 486,815.28 and 330,656.40

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Solution

The fourth proportional to 353,051.28, 486,815.28 and 330,656.40 is: 455,935.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,051.28 : 486,815.28 = 330,656.40 : x
  2. Step 2: Convert to fraction form
    353,051.28/486,815.28 = 330,656.40/x
  3. Step 3: Cross multiply
    353,051.28x = 486,815.28 × 330,656.40
  4. Step 4: Simplify right side
    353,051.28x = 160,968,587,949.79
  5. Step 5: Solve for x
    x = 160,968,587,949.79/353,051.28
  6. Step 6: Final answer
    x = 455,935.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.