Home / 515,396.22-768,909.49-487,495.57

Finding the Fourth Proportional to 515,396.22, 768,909.49 and 487,495.57

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Solution

The fourth proportional to 515,396.22, 768,909.49 and 487,495.57 is: 727,285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,396.22 : 768,909.49 = 487,495.57 : x
  2. Step 2: Convert to fraction form
    515,396.22/768,909.49 = 487,495.57/x
  3. Step 3: Cross multiply
    515,396.22x = 768,909.49 × 487,495.57
  4. Step 4: Simplify right side
    515,396.22x = 374,839,963,823.93
  5. Step 5: Solve for x
    x = 374,839,963,823.93/515,396.22
  6. Step 6: Final answer
    x = 727,285.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.