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Finding the Fourth Proportional to 399,434.76, 550,966.86 and 303,731.64

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Solution

The fourth proportional to 399,434.76, 550,966.86 and 303,731.64 is: 418,957.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,434.76 : 550,966.86 = 303,731.64 : x
  2. Step 2: Convert to fraction form
    399,434.76/550,966.86 = 303,731.64/x
  3. Step 3: Cross multiply
    399,434.76x = 550,966.86 × 303,731.64
  4. Step 4: Simplify right side
    399,434.76x = 167,346,067,973.45
  5. Step 5: Solve for x
    x = 167,346,067,973.45/399,434.76
  6. Step 6: Final answer
    x = 418,957.20

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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.