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Finding the Fourth Proportional to 625,368.72, 938,043.21 and 198,898.41

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Solution

The fourth proportional to 625,368.72, 938,043.21 and 198,898.41 is: 298,344.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,368.72 : 938,043.21 = 198,898.41 : x
  2. Step 2: Convert to fraction form
    625,368.72/938,043.21 = 198,898.41/x
  3. Step 3: Cross multiply
    625,368.72x = 938,043.21 × 198,898.41
  4. Step 4: Simplify right side
    625,368.72x = 186,575,302,980.30
  5. Step 5: Solve for x
    x = 186,575,302,980.30/625,368.72
  6. Step 6: Final answer
    x = 298,344.48

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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.