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Finding the Fourth Proportional to 389,472.75, 537,472.40 and 210,624.75

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Solution

The fourth proportional to 389,472.75, 537,472.40 and 210,624.75 is: 290,662.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,472.75 : 537,472.40 = 210,624.75 : x
  2. Step 2: Convert to fraction form
    389,472.75/537,472.40 = 210,624.75/x
  3. Step 3: Cross multiply
    389,472.75x = 537,472.40 × 210,624.75
  4. Step 4: Simplify right side
    389,472.75x = 113,204,988,828.78
  5. Step 5: Solve for x
    x = 113,204,988,828.78/389,472.75
  6. Step 6: Final answer
    x = 290,662.16

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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.