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Finding the Fourth Proportional to 515,416.66, 772,335.89 and 215,734.07

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Solution

The fourth proportional to 515,416.66, 772,335.89 and 215,734.07 is: 323,270.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,416.66 : 772,335.89 = 215,734.07 : x
  2. Step 2: Convert to fraction form
    515,416.66/772,335.89 = 215,734.07/x
  3. Step 3: Cross multiply
    515,416.66x = 772,335.89 × 215,734.07
  4. Step 4: Simplify right side
    515,416.66x = 166,619,167,831.45
  5. Step 5: Solve for x
    x = 166,619,167,831.45/515,416.66
  6. Step 6: Final answer
    x = 323,270.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.