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Finding the Fourth Proportional to 387,166.88, 534,276.44 and 217,408.16

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Solution

The fourth proportional to 387,166.88, 534,276.44 and 217,408.16 is: 300,015.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,166.88 : 534,276.44 = 217,408.16 : x
  2. Step 2: Convert to fraction form
    387,166.88/534,276.44 = 217,408.16/x
  3. Step 3: Cross multiply
    387,166.88x = 534,276.44 × 217,408.16
  4. Step 4: Simplify right side
    387,166.88x = 116,156,057,751.75
  5. Step 5: Solve for x
    x = 116,156,057,751.75/387,166.88
  6. Step 6: Final answer
    x = 300,015.48

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1.5x scale

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.