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Finding the Fourth Proportional to 515,661.41, 772,700.94 and 215,978.01

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Solution

The fourth proportional to 515,661.41, 772,700.94 and 215,978.01 is: 323,635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,661.41 : 772,700.94 = 215,978.01 : x
  2. Step 2: Convert to fraction form
    515,661.41/772,700.94 = 215,978.01/x
  3. Step 3: Cross multiply
    515,661.41x = 772,700.94 × 215,978.01
  4. Step 4: Simplify right side
    515,661.41x = 166,886,411,346.33
  5. Step 5: Solve for x
    x = 166,886,411,346.33/515,661.41
  6. Step 6: Final answer
    x = 323,635.64

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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.