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Finding the Fourth Proportional to 389,363.44, 537,320.54 and 217,279.60

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Solution

The fourth proportional to 389,363.44, 537,320.54 and 217,279.60 is: 299,845.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,363.44 : 537,320.54 = 217,279.60 : x
  2. Step 2: Convert to fraction form
    389,363.44/537,320.54 = 217,279.60/x
  3. Step 3: Cross multiply
    389,363.44x = 537,320.54 × 217,279.60
  4. Step 4: Simplify right side
    389,363.44x = 116,748,792,002.98
  5. Step 5: Solve for x
    x = 116,748,792,002.98/389,363.44
  6. Step 6: Final answer
    x = 299,845.29

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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.