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Finding the Fourth Proportional to 389,487.52, 537,498 and 219,721.12

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Solution

The fourth proportional to 389,487.52, 537,498 and 219,721.12 is: 303,218.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,487.52 : 537,498 = 219,721.12 : x
  2. Step 2: Convert to fraction form
    389,487.52/537,498 = 219,721.12/x
  3. Step 3: Cross multiply
    389,487.52x = 537,498 × 219,721.12
  4. Step 4: Simplify right side
    389,487.52x = 118,099,662,557.76
  5. Step 5: Solve for x
    x = 118,099,662,557.76/389,487.52
  6. Step 6: Final answer
    x = 303,218.09

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1.5x scale

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.