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Finding the Fourth Proportional to 398,590.50, 550,076.76 and 228,835.56

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Solution

The fourth proportional to 398,590.50, 550,076.76 and 228,835.56 is: 315,805.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,590.50 : 550,076.76 = 228,835.56 : x
  2. Step 2: Convert to fraction form
    398,590.50/550,076.76 = 228,835.56/x
  3. Step 3: Cross multiply
    398,590.50x = 550,076.76 × 228,835.56
  4. Step 4: Simplify right side
    398,590.50x = 125,877,123,417.59
  5. Step 5: Solve for x
    x = 125,877,123,417.59/398,590.50
  6. Step 6: Final answer
    x = 315,805.63

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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.