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Finding the Fourth Proportional to 399,069.84, 550,810.64 and 229,402.40

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Solution

The fourth proportional to 399,069.84, 550,810.64 and 229,402.40 is: 316,629.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,069.84 : 550,810.64 = 229,402.40 : x
  2. Step 2: Convert to fraction form
    399,069.84/550,810.64 = 229,402.40/x
  3. Step 3: Cross multiply
    399,069.84x = 550,810.64 × 229,402.40
  4. Step 4: Simplify right side
    399,069.84x = 126,357,282,761.54
  5. Step 5: Solve for x
    x = 126,357,282,761.54/399,069.84
  6. Step 6: Final answer
    x = 316,629.50

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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.