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Finding the Fourth Proportional to 389,451.87, 537,443.36 and 210,603.87

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Solution

The fourth proportional to 389,451.87, 537,443.36 and 210,603.87 is: 290,633.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,451.87 : 537,443.36 = 210,603.87 : x
  2. Step 2: Convert to fraction form
    389,451.87/537,443.36 = 210,603.87/x
  3. Step 3: Cross multiply
    389,451.87x = 537,443.36 × 210,603.87
  4. Step 4: Simplify right side
    389,451.87x = 113,187,650,468.78
  5. Step 5: Solve for x
    x = 113,187,650,468.78/389,451.87
  6. Step 6: Final answer
    x = 290,633.22

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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.