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Finding the Fourth Proportional to 663,638.22, 915,898.52 and 377,201.38

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Solution

The fourth proportional to 663,638.22, 915,898.52 and 377,201.38 is: 520,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,638.22 : 915,898.52 = 377,201.38 : x
  2. Step 2: Convert to fraction form
    663,638.22/915,898.52 = 377,201.38/x
  3. Step 3: Cross multiply
    663,638.22x = 915,898.52 × 377,201.38
  4. Step 4: Simplify right side
    663,638.22x = 345,478,185,683.96
  5. Step 5: Solve for x
    x = 345,478,185,683.96/663,638.22
  6. Step 6: Final answer
    x = 520,582.11

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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.