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Finding the Fourth Proportional to 515,580.69, 772,456.01 and 215,400.63

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Solution

The fourth proportional to 515,580.69, 772,456.01 and 215,400.63 is: 322,718.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,580.69 : 772,456.01 = 215,400.63 : x
  2. Step 2: Convert to fraction form
    515,580.69/772,456.01 = 215,400.63/x
  3. Step 3: Cross multiply
    515,580.69x = 772,456.01 × 215,400.63
  4. Step 4: Simplify right side
    515,580.69x = 166,387,510,124.28
  5. Step 5: Solve for x
    x = 166,387,510,124.28/515,580.69
  6. Step 6: Final answer
    x = 322,718.66

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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.