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Finding the Fourth Proportional to 387,758.96, 535,108.20 and 217,994.48

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Solution

The fourth proportional to 387,758.96, 535,108.20 and 217,994.48 is: 300,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,758.96 : 535,108.20 = 217,994.48 : x
  2. Step 2: Convert to fraction form
    387,758.96/535,108.20 = 217,994.48/x
  3. Step 3: Cross multiply
    387,758.96x = 535,108.20 × 217,994.48
  4. Step 4: Simplify right side
    387,758.96x = 116,650,633,802.74
  5. Step 5: Solve for x
    x = 116,650,633,802.74/387,758.96
  6. Step 6: Final answer
    x = 300,832.85

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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.