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Finding the Fourth Proportional to 389,990.39, 538,190.30 and 228,848.13

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Solution

The fourth proportional to 389,990.39, 538,190.30 and 228,848.13 is: 315,812.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,990.39 : 538,190.30 = 228,848.13 : x
  2. Step 2: Convert to fraction form
    389,990.39/538,190.30 = 228,848.13/x
  3. Step 3: Cross multiply
    389,990.39x = 538,190.30 × 228,848.13
  4. Step 4: Simplify right side
    389,990.39x = 123,163,842,594.90
  5. Step 5: Solve for x
    x = 123,163,842,594.90/389,990.39
  6. Step 6: Final answer
    x = 315,812.51

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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.