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Finding the Fourth Proportional to 387,179.84, 534,314.40 and 217,410.32

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Solution

The fourth proportional to 387,179.84, 534,314.40 and 217,410.32 is: 300,029.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,179.84 : 534,314.40 = 217,410.32 : x
  2. Step 2: Convert to fraction form
    387,179.84/534,314.40 = 217,410.32/x
  3. Step 3: Cross multiply
    387,179.84x = 534,314.40 × 217,410.32
  4. Step 4: Simplify right side
    387,179.84x = 116,165,464,684.61
  5. Step 5: Solve for x
    x = 116,165,464,684.61/387,179.84
  6. Step 6: Final answer
    x = 300,029.73

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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.