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Finding the Fourth Proportional to 515,871.66, 769,618.47 and 487,970.22

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Solution

The fourth proportional to 515,871.66, 769,618.47 and 487,970.22 is: 727,992.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,871.66 : 769,618.47 = 487,970.22 : x
  2. Step 2: Convert to fraction form
    515,871.66/769,618.47 = 487,970.22/x
  3. Step 3: Cross multiply
    515,871.66x = 769,618.47 × 487,970.22
  4. Step 4: Simplify right side
    515,871.66x = 375,550,894,121.96
  5. Step 5: Solve for x
    x = 375,550,894,121.96/515,871.66
  6. Step 6: Final answer
    x = 727,992.88

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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.