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Finding the Fourth Proportional to 387,968.94, 535,374.36 and 215,881.20

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Solution

The fourth proportional to 387,968.94, 535,374.36 and 215,881.20 is: 297,903.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,968.94 : 535,374.36 = 215,881.20 : x
  2. Step 2: Convert to fraction form
    387,968.94/535,374.36 = 215,881.20/x
  3. Step 3: Cross multiply
    387,968.94x = 535,374.36 × 215,881.20
  4. Step 4: Simplify right side
    387,968.94x = 115,577,259,286.03
  5. Step 5: Solve for x
    x = 115,577,259,286.03/387,968.94
  6. Step 6: Final answer
    x = 297,903.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.