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Finding the Fourth Proportional to 389,801.50, 537,926.11 and 210,953.50

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Solution

The fourth proportional to 389,801.50, 537,926.11 and 210,953.50 is: 291,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,801.50 : 537,926.11 = 210,953.50 : x
  2. Step 2: Convert to fraction form
    389,801.50/537,926.11 = 210,953.50/x
  3. Step 3: Cross multiply
    389,801.50x = 537,926.11 × 210,953.50
  4. Step 4: Simplify right side
    389,801.50x = 113,477,395,645.89
  5. Step 5: Solve for x
    x = 113,477,395,645.89/389,801.50
  6. Step 6: Final answer
    x = 291,115.85

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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.