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Finding the Fourth Proportional to 389,508, 537,521.04 and 210,660

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Solution

The fourth proportional to 389,508, 537,521.04 and 210,660 is: 290,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,508 : 537,521.04 = 210,660 : x
  2. Step 2: Convert to fraction form
    389,508/537,521.04 = 210,660/x
  3. Step 3: Cross multiply
    389,508x = 537,521.04 × 210,660
  4. Step 4: Simplify right side
    389,508x = 113,234,182,286.40
  5. Step 5: Solve for x
    x = 113,234,182,286.40/389,508
  6. Step 6: Final answer
    x = 290,710.80

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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.