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Finding the Fourth Proportional to 515,656.45, 772,693.44 and 215,973.01

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Solution

The fourth proportional to 515,656.45, 772,693.44 and 215,973.01 is: 323,628.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,656.45 : 772,693.44 = 215,973.01 : x
  2. Step 2: Convert to fraction form
    515,656.45/772,693.44 = 215,973.01/x
  3. Step 3: Cross multiply
    515,656.45x = 772,693.44 × 215,973.01
  4. Step 4: Simplify right side
    515,656.45x = 166,880,928,044.05
  5. Step 5: Solve for x
    x = 166,880,928,044.05/515,656.45
  6. Step 6: Final answer
    x = 323,628.12

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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.