Home / 687,911.43-949,405.33-415,981.30

Finding the Fourth Proportional to 687,911.43, 949,405.33 and 415,981.30

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Solution

The fourth proportional to 687,911.43, 949,405.33 and 415,981.30 is: 574,107.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,911.43 : 949,405.33 = 415,981.30 : x
  2. Step 2: Convert to fraction form
    687,911.43/949,405.33 = 415,981.30/x
  3. Step 3: Cross multiply
    687,911.43x = 949,405.33 × 415,981.30
  4. Step 4: Simplify right side
    687,911.43x = 394,934,859,486.78
  5. Step 5: Solve for x
    x = 394,934,859,486.78/687,911.43
  6. Step 6: Final answer
    x = 574,107.13

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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.