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Finding the Fourth Proportional to 389,372.70, 537,333.36 and 217,288.88

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Solution

The fourth proportional to 389,372.70, 537,333.36 and 217,288.88 is: 299,858.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,372.70 : 537,333.36 = 217,288.88 : x
  2. Step 2: Convert to fraction form
    389,372.70/537,333.36 = 217,288.88/x
  3. Step 3: Cross multiply
    389,372.70x = 537,333.36 × 217,288.88
  4. Step 4: Simplify right side
    389,372.70x = 116,756,563,981.04
  5. Step 5: Solve for x
    x = 116,756,563,981.04/389,372.70
  6. Step 6: Final answer
    x = 299,858.12

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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.