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Finding the Fourth Proportional to 660,114.43, 910,960.90 and 373,689.92

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Solution

The fourth proportional to 660,114.43, 910,960.90 and 373,689.92 is: 515,693.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,114.43 : 910,960.90 = 373,689.92 : x
  2. Step 2: Convert to fraction form
    660,114.43/910,960.90 = 373,689.92/x
  3. Step 3: Cross multiply
    660,114.43x = 910,960.90 × 373,689.92
  4. Step 4: Simplify right side
    660,114.43x = 340,416,907,187.31
  5. Step 5: Solve for x
    x = 340,416,907,187.31/660,114.43
  6. Step 6: Final answer
    x = 515,693.78

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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.