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Finding the Fourth Proportional to 387,103.50, 534,202.83 and 217,337.63

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Solution

The fourth proportional to 387,103.50, 534,202.83 and 217,337.63 is: 299,925.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,103.50 : 534,202.83 = 217,337.63 : x
  2. Step 2: Convert to fraction form
    387,103.50/534,202.83 = 217,337.63/x
  3. Step 3: Cross multiply
    387,103.50x = 534,202.83 × 217,337.63
  4. Step 4: Simplify right side
    387,103.50x = 116,102,374,340.48
  5. Step 5: Solve for x
    x = 116,102,374,340.48/387,103.50
  6. Step 6: Final answer
    x = 299,925.92

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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.