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Finding the Fourth Proportional to 387,242.88, 534,480.49 and 215,219.90

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Solution

The fourth proportional to 387,242.88, 534,480.49 and 215,219.90 is: 297,050.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,242.88 : 534,480.49 = 215,219.90 : x
  2. Step 2: Convert to fraction form
    387,242.88/534,480.49 = 215,219.90/x
  3. Step 3: Cross multiply
    387,242.88x = 534,480.49 × 215,219.90
  4. Step 4: Simplify right side
    387,242.88x = 115,030,839,214.98
  5. Step 5: Solve for x
    x = 115,030,839,214.98/387,242.88
  6. Step 6: Final answer
    x = 297,050.89

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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.