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Finding the Fourth Proportional to 389,805.09, 538,060.58 and 228,601.32

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Solution

The fourth proportional to 389,805.09, 538,060.58 and 228,601.32 is: 315,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,805.09 : 538,060.58 = 228,601.32 : x
  2. Step 2: Convert to fraction form
    389,805.09/538,060.58 = 228,601.32/x
  3. Step 3: Cross multiply
    389,805.09x = 538,060.58 × 228,601.32
  4. Step 4: Simplify right side
    389,805.09x = 123,001,357,684.96
  5. Step 5: Solve for x
    x = 123,001,357,684.96/389,805.09
  6. Step 6: Final answer
    x = 315,545.80

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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.