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Finding the Fourth Proportional to 389,633.36, 537,688.80 and 217,554

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Solution

The fourth proportional to 389,633.36, 537,688.80 and 217,554 is: 300,221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,633.36 : 537,688.80 = 217,554 : x
  2. Step 2: Convert to fraction form
    389,633.36/537,688.80 = 217,554/x
  3. Step 3: Cross multiply
    389,633.36x = 537,688.80 × 217,554
  4. Step 4: Simplify right side
    389,633.36x = 116,976,349,195.20
  5. Step 5: Solve for x
    x = 116,976,349,195.20/389,633.36
  6. Step 6: Final answer
    x = 300,221.60

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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.