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Finding the Fourth Proportional to 389,837.76, 537,972 and 228,661.92

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Solution

The fourth proportional to 389,837.76, 537,972 and 228,661.92 is: 315,551.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,837.76 : 537,972 = 228,661.92 : x
  2. Step 2: Convert to fraction form
    389,837.76/537,972 = 228,661.92/x
  3. Step 3: Cross multiply
    389,837.76x = 537,972 × 228,661.92
  4. Step 4: Simplify right side
    389,837.76x = 123,013,710,426.24
  5. Step 5: Solve for x
    x = 123,013,710,426.24/389,837.76
  6. Step 6: Final answer
    x = 315,551.04

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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.