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Finding the Fourth Proportional to 625,434, 938,219.91 and 198,870.03

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Solution

The fourth proportional to 625,434, 938,219.91 and 198,870.03 is: 298,326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,434 : 938,219.91 = 198,870.03 : x
  2. Step 2: Convert to fraction form
    625,434/938,219.91 = 198,870.03/x
  3. Step 3: Cross multiply
    625,434x = 938,219.91 × 198,870.03
  4. Step 4: Simplify right side
    625,434x = 186,583,820,653.95
  5. Step 5: Solve for x
    x = 186,583,820,653.95/625,434
  6. Step 6: Final answer
    x = 298,326.95

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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.