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Finding the Fourth Proportional to 389,353.50, 537,308.64 and 210,505.50

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Solution

The fourth proportional to 389,353.50, 537,308.64 and 210,505.50 is: 290,498.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,353.50 : 537,308.64 = 210,505.50 : x
  2. Step 2: Convert to fraction form
    389,353.50/537,308.64 = 210,505.50/x
  3. Step 3: Cross multiply
    389,353.50x = 537,308.64 × 210,505.50
  4. Step 4: Simplify right side
    389,353.50x = 113,106,423,917.52
  5. Step 5: Solve for x
    x = 113,106,423,917.52/389,353.50
  6. Step 6: Final answer
    x = 290,498.03

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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.