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Finding the Fourth Proportional to 398,932.20, 550,888.63 and 296,920.40

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Solution

The fourth proportional to 398,932.20, 550,888.63 and 296,920.40 is: 410,019.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,932.20 : 550,888.63 = 296,920.40 : x
  2. Step 2: Convert to fraction form
    398,932.20/550,888.63 = 296,920.40/x
  3. Step 3: Cross multiply
    398,932.20x = 550,888.63 × 296,920.40
  4. Step 4: Simplify right side
    398,932.20x = 163,570,068,878.31
  5. Step 5: Solve for x
    x = 163,570,068,878.31/398,932.20
  6. Step 6: Final answer
    x = 410,019.72

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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.